How Light Can You Go?

Why less weight per rep can make you stronger in the long run.

Train heavy to get strong – that's the rule of thumb in almost every gym. So week after week people work at 85, 90 or 95 % of their max, every set close to failure. That works for a while. Then come plateaus, aching joints and sessions that leave you wrecked for two days.

Powerlifter and coach Matt Vena shows there's another way. He took his squat from 355 to 400 kg in about 16 months – without a single rep set above 80 % of his max. He worked almost exclusively with doubles, i.e. sets of two. That put him at around 10 or more reps in reserve (RIR).

Sounds too easy to work? Let's look at what's behind it – and how you can try the principle yourself.

The Idea: Compound Lifts as Technique Practice

Squat, bench press and deadlift aren't just strength exercises, they're skills. Practise them often, cleanly and fresh, and you get more efficient – much like a tennis serve. Two things are key for motor learning: lots of practice (volume) and little fatigue. That's exactly what lighter training allows: more clean reps, less exhaustion.

The open question, of course: does that outweigh the advantage of heavy loads, which are simply more specific for strength? The research offers some pointers.

1. Proximity to Failure: Less Is Often More

Here the research is comparatively clear. A meta-analysis by Grgic and colleagues (2022) shows: training to failure provides no additional benefit for strength gains compared with training with reps in reserve.

Why might that be? Two possible reasons:

• —Fatigue disrupts learning. A study by Branscheidt et al. (2019) shows that fatigue has a lasting negative effect on learning a motor task. It didn't test squats but a fine-motor hand task – the principle still carries over to technique-heavy lifts.
• —Fibre types shift. Pareja-Blanco et al. (2017) had athletes squat with 20 % or 40 % velocity loss per set. The group that went closer to failure lost some of its fastest muscle fibres (type IIX) – with similar or even smaller gains in jumping and speed.

2. Absolute Load: Heavy Still Matters

Let's be honest: there are meta-analyses showing that heavier loads are better for maximal strength when everything else is equal (Currier et al., 2023). The catch: these comparisons equalise volume to isolate load as the only variable. In real training, though, you trade load for volume – lighter also means more sets are possible.

And volume is clearly linked to strength, albeit with sharply diminishing returns. That's shown by a recent meta-regression on the dose-response relationship of training volume (Pelland et al., 2026). The first sets bring a lot, each additional one a little less.

3. Weight on the Bar ≠ Force Produced

An often overlooked point: load and force production aren't 1:1. If you move a lighter load with maximal intent, you also activate your muscles very strongly – a larger share of the force simply goes into acceleration instead of more weight.

Force plate measurements (among others Appleby et al., 2019) provide data on this. Vena derives from them: going from 80 to 90 % of 1RM is a relative load increase of 12.5 % – but measured force only rises by about 5 %.

The consequence: every rep at 75 % – performed explosively – is a much stronger stimulus than the percentage suggests.

Whether the more efficient force transfer during heavy, slow reps improves with practice is still unclear. The data just isn't there yet.

4. How Light Can You Go?

Vena himself trains bench press at around 66 % and squat and deadlift at around 70 % – all as doubles. For his athletes, he uses a simple formula as a starting point:

The 80-minus-2 rule

Intensity = 80 % – (2 % × reps)

• —2 reps → 76 % · 3 reps → 74 % · 4 reps → 72 % · 5 reps → 70 %

Then add sets until the fatigue roughly matches what you know from heavier training.

An example from his practice: his athlete Theron set a junior world record in the up-to-93-kg class with a 335.5 kg squat. The heaviest rep sets in the entire cycle: triples at 252.5 kg – a mere 75.2 %.

5. Important: Heavy Top Sets Stay In

Light volume doesn't mean never lifting heavy again. Maximal strength is also about getting used to heavy loads. That's why regular, controlled top sets – say, one heavy single per week – still belong in the programme. The light training only replaces the volume work.

Who Is This For?

• —Advanced lifters who are stuck with classic heavy training.
• —Anyone with limited recovery capacity – job, family, lack of sleep.
• —Lifters with joint issues who currently don't tolerate heavy loads well.
• —Technique projects: if you want to refine your movement pattern, you need lots of clean reps.

The flip side: lighter training needs more sets – and therefore more time. If you only have 45 minutes, you have to prioritise.

Bottom Line

You don't have to train every session at your limit to get stronger. Moderate loads, plenty of reserve and explosive reps turn your compound lifts into targeted technique practice – complemented by regular heavy top sets. The research isn't clear-cut on every point, but it clearly supports giving the principle a try.

We use training protocols like this in the Lifting Club, among other places – just ask us about it at the gym.

Sources (selection)

• —Grgic J. et al. (2022): Effects of resistance training performed to repetition failure or non-failure on muscular strength and hypertrophy. J Sport Health Sci.
• —Branscheidt M. et al. (2019): Fatigue induces long-lasting detrimental changes in motor-skill learning. eLife.
• —Pareja-Blanco F. et al. (2017): Effects of velocity loss during resistance training on athletic performance, strength gains and muscle adaptations. Scand J Med Sci Sports.
• —Currier B. S. et al. (2023): Resistance training prescription for muscle strength and hypertrophy in healthy adults. Br J Sports Med.
• —Pelland J. C. et al. (2026): The Resistance Training Dose Response: Meta-Regressions Exploring the Effects of Weekly Volume and Frequency on Muscle Hypertrophy and Strength Gains. Sports Med.
• —Appleby B. B. et al. (2019): Reliability of Squat Kinetics in Well-Trained Rugby Players: Implications for Monitoring Training. J Strength Cond Res.
• —Based on an Instagram post by Matt Vena (@mattvena), 2 September 2026.