Quote (MrBobMarley @ Apr 2 2013 01:32pm)
Can you explain to me the difference between gaining strength and gaining muscle mass? I know typically higher weight/lower reps is ideal for strength, and then lower weight higher reps for muscle mass, but why? I also see it that people training in the higher rep range making great progress in strength. I know some details in regards to this, but some are fuzzy
1. How closely are the two correlated
2. What exactly is it that produces an increase in strength
3. What exactly is it the produces an increase in muscle mass
1. Strength typically correlates to the density of a muscle, and the ability for that muscle to perform a contraction in harmony with other muscles in the same direction.
2. Muscle mass otherwise known as volume, is the overall size of a muscle which is mostly concurrent with constant microscopic long tearing of the muscle fibers, causing the muscle to grow larger over time as it repairs.
Usually, to train for strength, one performs maximum weight exericses in the area of 1-5 reps. Much rest is taken between sets, and the overall goal is to increase the total maximum weight lifted.
To train for volume, one performs maximum intensity, often failing before the end of the set, reducing the weight, and continuing the exhaust the muscles until total failure. Overall weight here is not as important.
Generally, when training for strength, muscle volume comes as well, but not as quickly. When training for volume, muscle strength comes as well, but not as quickly.
As a result, the focus on whether to force the muscles to fail and exhaust (thus causing more microscopic tears), or the focus on increasing the muscle density through maximum weight exertion (also tearing the fibers, but short tears), determines which path you take.
The bottom line, you should be using a solid strength routine to build a platform. Once you have a good strength platform in place, you can train for volume if you seek aesthetics (bodybuilding, fitness modeling etc) - if you seek to be a strongman, Olympic lifter, or power lifter, you would seek to work on strength routines with volume only considered for endurance purposes.