How does training for maximum strength affect the elasticity of your tendons?
Maximum strength training makes your tendons measurably stiffer and rewrites the composition of tendon tissue. Stretching increases your range of motion but barely changes the mechanical properties of your tendons.
Maximum strength training makes your tendons stiffer, and that is a good thing. Among well-trained triathletes who trained for maximum strength three times a week for twelve weeks alongside their regular endurance training, the stiffness of the Achilles tendon increased by an average of 39%. The kneecap tendon became an average of 16% stiffer. Stiffer tendons store energy more efficiently and return it with every step or jump, which can benefit your running economy and performance.
These changes are not superficial. After strength training sessions, blood markers that signal active restructuring of tendon tissue rose by 31 to 46%. This suggests that the tendon is genuinely being rebuilt differently, not merely feeling different.
Stretching works differently. Programmes of three to eight weeks focused on static, dynamic or intensive stretching barely change the mechanical properties of muscles and tendons. Your flexibility does increase, but this is likely because you become more tolerant of how far a muscle is lengthened, not because the tissue itself becomes more supple or stiffer. Structurally, little about the tendon itself changes.
If you genuinely want to influence your tendon properties, maximum strength training has the most support behind it. Stretching helps your range of motion and has its own role to play, but it does not rewrite the mechanical blueprint of your tendons.
This answer draws on two sources: a study in well-trained triathletes (twelve weeks of maximum strength training) and a summary of multiple studies into the effects of stretching programmes on muscle and tendon properties. The evidence for the effects of strength training on tendon stiffness is reasonably strong within this specific group (endurance athletes). Whether the same figures apply to people who do not do intensive endurance sport has not been examined in these studies. For stretching, the researchers rated the effects on mechanical properties as trivial, while the effects on flexibility were small but present.
How do you train smart for lasting muscle strength in older age?
Research shows that training volume matters in older adults: a low volume is already enough to maintain daily functioning and muscle mass, while you need more volume if you want to increase your maximum leg strength. If you already have muscle loss, the combination of strength training, balance exercises and a protein-rich diet delivers the most measurable gains.
Do you need to train to muscle failure for maximum muscle growth?
Research shows that you can achieve excellent muscle growth without pushing every set to the absolute limit. Total training volume counts for more than how far you go within each set.
When does your muscle strength start to decline?
Muscle strength reaches its peak somewhere between your thirties and forties and gradually declines after that. Regularly training your muscles with weights or resistance is the most effective way to slow that decline.
How often and how heavy should I strength train?
Start with 2 to 3 training days per week, sets of 8 to 12 repetitions close to your maximum, and increase the weight as soon as you can add extra repetitions. This demonstrably builds both strength and muscle mass at every level.
Is training to muscle failure better or worse for your joints?
Whether training to muscle failure is good or bad for your joints depends strongly on how you do it: a slow, controlled approach produces considerably less joint stress than an explosive method emphasising the lengthening phase of movement, and the risk is smaller with healthy joints than with osteoarthritis.
How do you adapt strength training smartly as you get older?
Strength training demonstrably works for older adults, and you can adapt it smartly with two sessions per week at 70 to 79 percent of your maximum, two to three sets per exercise, combined with balance exercises and a little extra protein.