Why holding weights longer can build muscle even with lighter weights
When duration matters: rethinking resistance training load through time under tension
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
This article says that how long your muscles are working during exercise matters just as much as how heavy the weight is. Slowing down the lowering part of a lift makes muscles work harder and repair more, while speeding up the lifting part can make you stronger faster. Even if you use light weights, if you make your muscles work longer, you can still grow and get stronger.
Surprising Findings
Muscle growth can occur with low loads if TUT is increased
Common belief is that heavy loads (70%+ 1RM) are required for hypertrophy; this suggests mechanical tension over time can substitute for load intensity.
Practical Takeaways
Use slower eccentrics (3–5 seconds down) and controlled concentrics (1–2 seconds up) during bodyweight or light dumbbell exercises to build muscle without heavy loads.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
This article says that how long your muscles are working during exercise matters just as much as how heavy the weight is. Slowing down the lowering part of a lift makes muscles work harder and repair more, while speeding up the lifting part can make you stronger faster. Even if you use light weights, if you make your muscles work longer, you can still grow and get stronger.
Surprising Findings
Muscle growth can occur with low loads if TUT is increased
Common belief is that heavy loads (70%+ 1RM) are required for hypertrophy; this suggests mechanical tension over time can substitute for load intensity.
Practical Takeaways
Use slower eccentrics (3–5 seconds down) and controlled concentrics (1–2 seconds up) during bodyweight or light dumbbell exercises to build muscle without heavy loads.
Publication
Journal
Revista Brasileira de Cineantropometria & Desempenho Humano
Year
2025
Authors
E. de Souza Bezerra
Related Content
Claims (9)
Your muscles grow bigger mainly because of how much total force they feel over time—not whether you do your workouts all at once or spread out over the week.
Lifting weights fast or slow doesn’t make much difference in how much your muscles grow — the extra gain from going slow is practically nothing.
If you lift weights until you're really tired, it doesn't matter if you lift slowly or quickly—you'll still build about the same amount of muscle.
Rapidly pushing up a weight (like exploding upward in a squat) may make you stronger and faster than lifting the same weight slowly.
You can still build muscle and stay strong with lighter weights if you slow down the movement—this is especially helpful for seniors, injured people, or athletes taking a break from heavy lifting.