Can You Really “Ride Lighter”? Weight distribution in the saddle.

The idea that a rider can “ride lighter” is common in equestrian instruction. Riders are encouraged to take weight off the horse’s back, lighten the seat, avoid putting too much weight into the stirrups, or aim for fixed ratios such as 60/40, 80/20 or 50/50 between seat and feet.

These ratios can be useful coaching cues. They may help a rider become more aware of how they organise their body in the saddle. But they are not prescriptive. They can't be.

Why weight distribution in the saddle is about ratios, but not about being 'lighter'

Humans vary enormously, and physics dictates what happens to the rider’s mass. In simple terms - you cannot decide that 40 percent of your weight will sit in your feet and make it so. There is also evidence from outside equestrian sport that supports the idea that humans can't accurately control weight percentages. In orthopaedic rehabilitation, patients are often instructed to bear a specific percentage of body weight through one limb after surgery - for example 25 percent or 50 percent partial weight bearing. Multiple studies have shown that without objective feedback, people are consistently inaccurate at estimating these loads. Even when they believe they are matching the prescribed percentage, force plate measurements show significant over- or under-loading.

In simple terms - humans are not good at estimating how much of their body weight is going through a particular limb. If individuals standing on the ground with visual focus and conscious intent cannot reliably reproduce a specific percentage of body weight through one leg, it is unrealistic to expect riders - moving dynamically on a horse - to distribute precise percentages between seat and stirrups by feel alone. This does not mean riders cannot influence distribution. It means that fixed numerical ratios are an oversimplification of a far more complex and dynamic system.

The idea of “riding lighter” and fixed weight ratios seem to stem from the same misunderstanding - that weight distribution can be determined by intention alone, rather than actual biomechanics. Weight distribution is based on position, joint configuration and force generation. Rider's can't reduce their mass in the saddle anymore than they can make themselves lighter when standing on the floor. Though when in the saddle they can alter where it is distributed, between the two bases of support (saddle and stirrups)- it is this which is what is used in the rising trot and half seat to reduce the load on the horses back (and change where the riders centre of gravity is).

When standing weight goes through pelvis down thighs to feet. When sitting the weight above the pelvis goes into the pelvis not down into the thighs. Importance distinction between where weight goes standing compared to sitting.

So first lets separate coaching language from physics.

Gravity acts on the rider whether sitting deep, in rising trot, in half seat, or without stirrups. The horse supports the rider’s weight regardless of technique. Balance does not make you lighter. What changes is how forces are distributed, timed and absorbed within the horse-rider system. That is what makes a rider appear or feel “light” or “heavy”.

Start With Something Familiar - Sitting in a Chair

When sitting in a chair with hips, knees and ankles at roughly 90 degrees, the majority of body weight is transmitted through the seat - specifically through the ischial tuberosities, the seat bones - not the thighs. The torso’s axial load passes through the spine into the pelvis and into the chair. The thighs mainly contribute their own segmental weight.

You can see that one whole leg represents only around 15–20% of total body mass in anthropometric research. In a neutral seated position, the majority of trunk weight is designed to be transmitted through the seat bones into the saddle. These figures are based on population averages and will vary between individuals.

If you want to reduce load through the seat bones, that force must be taken up elsewhere.

You can either actively transfer force into the stirrups by supporting yourself through your hips, knees, and ankles - which requires muscular work - or you can tilt the pelvis or lean forward, which reduces direct seat bone contact but shifts load toward the pubic arch. Total body weight does not change. It is only redistributed.

Pressure mapping research shows load shifts with posture in a chair with thighs and feet supported:

Leaning forward = more load transfers into the thighs and feet.

Leaning back = more load shifts into the seat and sacrum.

Change trunk position = Change weight distribution

But even in the exactly same sitting position on the same chair there will be variability between the figures person to person. Different leg lengths, torso height, fat/muscle distribution, width of seat etc will all make a difference. If there is no clear weight ratio for when sitting statically on a chair with feet supported then how can there be one in riding?

The same principles must apply in the saddle.

What Happens When Sitting in the Saddle

In neutral sitting, we aim for a balanced spine with weight primarily through the seat bones. The thighs are angled differently than in a chair, so some load is naturally shared along the inner thigh with legs draped down the horses side and in contact with the saddle. However, the torso’s axial load still travels through the pelvis into the saddle.

Put simply - when you sit in the saddle the majority of your body weight still goes through your seat bones into the saddle.

Shoulder over hip, neutral pelvis and spine, torso weight in seat bones, leg weight in thighs.

As already discussed- seat bone pressure also changes with trunk angle- but this becomes more relevant in a saddle as thighs aren't in front to take the weight. Leaning forward and some load shifts toward the thighs BUT this then unbalances the rider and makes them need to grip with their thighs to stop falling forward, or they adapt by putting more weight into their stirrups. So yes less technically less weight in the seat bones but that may transfer to the pubic arch (not good) or require muscle activation to lift pubic arch off saddle (not designed for weight bearing) both compensations don't provide a stable pelvis for sitting. If you remain sitting without transferring support elsewhere, you will fall forward, you can't make the weight in the seat without leaning/tilting or transferring the weight into the stirrups.

Tipping forward takes weight out of seat bones and out them more into thighs when thighs supported

What about a rider slumping and being told they are being too heavy in the saddle, we know that when we lean back the seat bone and sacrum loading increases in sitting. This has been studied a lot in wheelchair design. But for riders this isn't what makes the rider look 'heavy', it is that the shift back changes where their centre of mass goes, it is now behind the horses movement, so they will not be as balanced. When people talk about light v heavy in riding- is it really balance and the ability to move with the horse that they are looking at?

What About the Legs?

The lower limbs are also subject to gravity. Without stirrups, leg mass is ultimately supported through the pelvis and seat, it is what makes maintaining a neutral pelvis and spine harder when work with no stirrups. With stirrups, leg weight can be supported distally - but only if joint angles and muscle activation allow the force transfer.

Shorter stirrups bring the feet closer to the pelvis, reducing the distance between the two bases of support. The hip, knee and ankle are more flexed, making force transfer into the stirrups mechanically easier, especially in dynamic positions. Longer stirrups increase the lever arm of the lower limb and tend to mean more seat loading in neutral sitting. Its's why altering stirrup length can help or hinder riders. Again if the riders weight isn't going anywhere as hanging loosely down by their side, it has to go somewhere, primarily into the seat bones as hips sit in pelvis where weight goes down but also into the soft tissue of the thighs. How much will depend on the angle of the thighs on the saddle. Wider angle (Wider horse, shorter legs) = more thigh weigh distribution than a narrower angle (longer legs, narrower horse) - the more horizontal the legs the more weight will sit into them, the more vertical the more weight taken by pelvis.

If the rider tips forward in the seat as in an anterior tilt then weight shifts forward and thighs will work to try and stabilise the rider by pressing into the saddle.

Simply placing the foot in the stirrup does not transfer trunk load from the seat. It supports the weight of the leg. Meaningful transfer requires force generation through hip and knee extension - similar to standing up from a chair. The horse’s upward movement in trot and canter can assist this transfer, but the mechanical shift still occurs through joint extension and reaction force.

You cannot “push more weight into the stirrups” any more than you can push more weight into your feet while standing still. Without joint extension and force production, distribution does not change. Transferring weight from seat to feet does not mean forcing weight into the stirrups. It means redistributing it.

Rising Trot, Half Seat and the Horse’s Back

So that has covered what happens in sitting but what about when not sitting?

Half seat involves transferring weight from seat to feet (like what happens when standing off a chair) in a hip and knee flexed position with torso bent forward. In contrast rising trot requires the rider to extend their hip and maintain an upright torso. Half seat requires the ability to stabilise lower leg and move body over the new base of support, rising trot needs the same ability for the lower leg stability but the rider utlises the energy generated from the horses hind limbs to initiate the hip extension.

This has been shown in rider research where saddle pressure studies show that forward or two-point positions reduce pressure in the caudal (towards tail) region of the saddle and shift load more cranially (head end) toward the withers compared to sitting trot.

Rising trot alternates load between saddle and stirrups. Sitting trot maintains continuous saddle contact, which can increase average pressure in the caudal thoracic region. However, when the rider allows the pelvis to follow the horse’s movement then the peak forces can be moderated through elastic joint motion (ie less bouncing when not rigid). In rising trot, stirrup forces can approach or exceed body weight during the rise phase and that is because of the load transfer between seat and feet. Interestingly one study showed how more elite riders had a smoother transfer of their body weight compare to more inexperienced riders who had sudden changes (peaks) in the pressures in saddle and stirrups.

In half seat, the rider shifts the centre of mass forward and that increases reliance on stirrup support as it is the new base of support. But that is not the same thing as relying on stirrups for balance which is often something that gets said when talking about weight in stirrups.

Even though this pressure distribution shifts forward on the horses back and the pressure from weight is no longer in the seat of the saddle, the horse still experiences the rider weight- just in a different place. And it's these positional changes that have been shown to influence thoracolumbar (back) movement in a ridden horse.

Offloading certain regions can influence back lift and hindlimb engagement. A “lighter seat” is one where load has been redistributed - not reduced- and is useful but it can't be done whilst sitting in the saddle in a neutral pelvis and spine with shoulder over hips.

Can Weight Sit in the Thighs or Knees?

There is another common misunderstanding about where the weight “goes” in half seat or rising trot.

Weight cannot meaningfully sit in the thighs, knees or lower leg in isolation. If the rider is out of the saddle and the stirrups are bearing load, that load ultimately transfers through the foot. The lower limb functions as a linked kinetic chain. You cannot load the thigh without that force travelling distally into the stirrup - unless something else is resisting it.

The only way to prevent that transfer is to actively press the thighs or knees into the saddle or horse’s sides. In that case, compressive force is generated inwards, and muscular effort is used to suspend body mass. Not energy efficient at all when you have stirrups and often ends up causing more problems (mainly a swinging lower leg).

It works without stirrups as the riders can hold themselves up using inner thigh and hip adductor activation. But it is can't usually be sustained for long periods and it replaces elastic load sharing with muscular tension. It can be a great exercise for riders to do. But it is not the same mechanism or muscle patterning needed when the rider has stirrups.

With stirrups present, actively trying to avoid weight transfer into the foot changes how the leg functions. Instead of operating as a more elastic, closed-chain system where force can travel through hip, knee and ankle into the stirrup, the rider creates unnecessary proximal (higher up) tension.

In simple terms - if you are trying not to put weight into the stirrup while out of the saddle, you are gripping. That gripping may stabilise you temporarily, but it reduces shock absorption, increases muscular fatigue and alters how the pelvis can move with the horse. This is what often happens when a rider grips with the knees and has a swinging lower leg.

So Can You Ride Lighter?

You cannot reduce gravitational load. You cannot make the horse feel your weight less by intention.

What you can do is:

• Reduce peak pressure

• Improve timing

• Improve coordination

• Absorb movement elastically rather than brace against it

• Transfer load with control

  
  

When that happens, the rider appears lighter because force transitions are smoother and less disruptive.

Lightness is not about less weight. It is about managing weight more effectively.

Weight distribution in the saddle is influenced by anatomy, stirrup length, trunk angle, thigh contact, gait phase and coordination.

It is not fixed. It is not one-size-fits-all. It is not a magic percentage.

Ratios may serve as coaching imagery. They are not biomechanical laws.

The meaningful question is not whether the rider is lighter, but how effectively forces are distributed, timed and absorbed within the horse-rider system.

It's why I always emphasise the importance of stable bases of support (neutral pelvis and ball of foot on stirrup), weight transfer than becomes much more controlled and helps so much with balance.

So What Should You Focus On Instead?

Start in a Riding Ready position.

That means being balanced and stable from the outset - so you can access the movement options you need in your legs, pelvis, and spine. When those areas can move independently and elastically, you can follow the horse’s movement and absorb force rather than brace against it.

That is what makes a rider look lighter - and what actually reduces peak pressure and impact on the horse’s back.

Training off the horse is part of this. Understanding what physical movements you need to be capable of - and learning how to assess what you personally can and cannot control - makes a far bigger difference than simply trying to “be lighter” in the saddle.

Developing the ability to transfer weight smoothly between seat and feet, without gripping or collapsing, gives you options. And options create stability, adjustability, and softness.

This is exactly what I work on in my Rider Physio sessions. Riders are often amazed at how much a single simulator session translates into immediate improvements once they’re back on their own horse.

It’s also what I’ll be breaking down inside the new Riding Ready subscription - focusing on the physical movements riders actually need, and how to build them in a way that transfers directly to the saddle.

We can’t make ourselves lighter in the saddle, but we can make our riding more comfortable and efficient, and that’s what really benefits the horse’s back.