Inarticulate brachiopods use a different opening mechanism, in which muscles reduce the length of the coelom (main body cavity) and make it bulge outwards, pushing the valves apart.
If you have a good director, you will find that he's getting you to use an entirely different muscle that you never even knew you had - it's real hard and sore, then after a while it becomes normal.
Only one study was identified which used a different measure of muscle function and that was maximal isometric knee extension strength (IKES) [ 60].
The difference between the two studies could again be a factor of rats vs. mice but is more likely due to the fact that we immunoprecipitated TSC2, whereas Miyazaki et al. used a different antibody on whole muscle lysates.
Other than the two orders with direct flight muscles, all other living winged insects fly using a different mechanism, involving indirect flight muscles.
A similar picture is obtained when the tree is constructed using a different multiple alignment method, Promals vs Muscle, and a different phylogenetic tree construction algorithm, BioNJ vs PhyML (data not shown).
Further work, however, is needed to quantify the performance of healthy subjects performing an isometric force reproduction task using a different experimental pain protocol (e.g. muscle saline injection).
Since the pull up is an exercise that uses many different muscle groups in the upper body, exercising these groups individually is one way to make pull ups easier.
Also, the process of climbing the hill on a bike uses different muscle groups as you shift about on the bike to maintain maximum power.
