20/01/2026
So true, let’s just move more and gradually increase the effort 👍
NEED vs SUFFICIENT: Why this debate misses the point
There’s a big difference between what is needed and what is sufficient for muscle and strength adaptations. And confusing the two is where many gym arguments go off the rails.
Here’s the simple truth: nothing is strictly needed in terms of a specific load, rep range, or style of lifting to gain muscle or get stronger (https://bjsm.bmj.com/content/57/18/1211.long) or experience any real health benefit from doing RT (https://journals.lww.com/acsm-healthfitness/fulltext/2023/11000/the_coming_of_age_of_resistance_exercise_as_a.7.aspx). Heavier loads work. Lighter loads work. Both are sufficient for hypertrophy and strength when training is done well. It works in novices, and it works in trained folks (https://journals.physiology.org/doi/full/10.1152/japplphysiol.00154.2016).
Yes, heavier weights tend to produce greater strength gains (https://journals.lww.com/nsca-jscr/fulltext/2017/12000/strength_and_hypertrophy_adaptations_between_low_.31.aspx and https://cdnsciencepub.com/doi/10.1139/apnm-2021-0515). But that’s a practice effect. If you train heavy, you get better at lifting heavy. That’s not magic physiology, it’s skill and specificity. In unpracticed tasks – isometric peak torque – everyone gets equally strong!
Importantly, lighter loads absolutely work, even in trained people, provided training is progressive. Progression can mean more load, more total volume, more sessions, or some smart combination of these. There is no special requirement to lift to absolute failure to make lighter- and heavier-load training equivalent (https://link.springer.com/article/10.1007/s40279-022-01784-y). That’s another myth that refuses to die.
And that old-school “strength–endurance continuum”? The idea that heavy weights are for strength and light weights are for endurance only? It’s simply wrong. Science has moved on, even if the gym floor arguments have not.
Sure, you can argue about time efficiency. Heavier loads might save you 10–15 minutes in some workouts. That’s a real but modest difference. It’s not the hill worth dying on.
Strip away the chalk dust, weight belts, and bro-science “disagreements,” and what’s left is this: MANY loading schemes are sufficient. None are strictly needed for the goals most mere mortals have when they go to the gym.
And here’s the part that really matters: 80% (likely more) of people don’t do any strengthening work at all. Arguing endlessly about the “best” way to lift is scorched-earth thinking. It’s counterfactual to evidence, public health and common sense.
If there is a specific task, sport, or event you want to train for, then by ALL means train for that. CrossFit, Hyrox, being “optimized” … this is not a threat, but it’s also not wrong!
Let’s stop fighting over trivial differences and get people lifting. This is not a threat to anyone’s favourite way to train. It’s simply ONE MORE option.
NOTE:
It works in trained people.
It doesn’t take that much more time.
If you don’t like (or want) to lift this way, so be it; you do you!
Ronnie was on steroids (Arnold was too).
Bone responds to heavier and lighter loads (https://www.sciencedirect.com/science/article/pii/S8756328220304774).
Nobody is saying do 100 reps (of anything).
Yes, there’s limit (likely 30% of 1RM).
Use rep ranges if you want to keep things in check.
Effort scales work well, with practice.
It recruits type II fibres (very effectively; https://physoc.onlinelibrary.wiley.com/doi/full/10.1113/JP278056)
At fatigue, no matter how you get there, all available motor units are engaged.
Power is developed at various loads – from 30-70% of 1RM.