This is a difficult question to phrase clearly, but let me try and lay it out.
WORKOUT X: Run 1 mile then 5 sets of: 15 pull-ups 60 jump-ropes 15 press-ups 60 jump-ropes 15 air-squats 60 jump-ropes
WORKOUT Y: 5 sets of the following: 15 pull-ups 15 press-ups 15 air-squats
Both workouts were done as required with the same level of intensity: each rep done in < 5 second and if needed a < 60 second rest period between sets. Pre/post-workout nutrition is the same for both.
Now my question is driven from a conversation I had this morning with two friends, who mentioned that my significant weight-loss versus muscle gain may most likely be related to doing more of a (X) workout rather than a (Y) workout. That I needed to notch back on the intensity and focus on max reps to failure. Although I am already doing max reps to failure in workout (X).
My question is, what is the actual biological/biochemical difference between these two workouts? If both use only body-weight, the strength reps are equal and the only difference is that (X) has an obvious increased aerobic element (running/jump-rope); is there anything actually going on differently in the body in terms of muscle and strength gains? Is there an anabolic/catabolic difference between the two and thus one effects muscle and strength development differently and less or more efficiently than the other?
Edit: Understandably these are probably very low rep workouts for the fitter amoung you, but my question should remain the same even with increased reps, dumbell presses, weighted squats et al or even a hypothetical workout routine. My question really is not about how to gain more muscle, that is quite straight forward. My question is what is the biological/biochemical difference between these two exercises if any and if and why one would be more effective than the other if the weight and reps are the same but one just has added aerobic?
Simply I am trying to find out if there is actually no difference at all in terms of strength gain, but rather one simply has added aerobic benefits. Or perhaps the added aerobic does have a negative effect. This is the question. Thanks. :)