metabolism of strong muscles vs large muscles

[kaur30]

the cell itself can burn calories. glycolysis takes place in the cytoplasm of the cell, whereas oxidative phosphorylation takes place in the mitochondria. glycolysis is continuously functioning in the body...at rest, sleeping, sitting around...and weight training. since weight training is anaerobic( it takes 2-3 minutes for the oxidative phos system to become active), the enzyme changes after weight training would be seen in the glycolytic system.

Mitochondrial increases would be seen with aerobic training(running/biking, etc).

[MidLifter]

If the number of mitochondria per cell remains the same, then the exercise which encourages more muscle cell division (hypersplasia) would burn more calories.

http://www.trainwiser.com/f96/muscle-fi ... tled-5285/

The relevant citations suggests that hypersplasia occurs with hypertrophy, but doesn't distinguish between types of hypertrophy.
http://www.ncbi.nlm.nih.gov/pubmed/2607952
http://www.springerlink.com/content/r544n1l27071345x/

Maybe calories burned per unit of volume of muscle would be a decent benchmark that takes muscle density into account? Here is a whimsical thought...Calculate LBM, then eat/count calories, on a weekly basis eat slightly more until you gain a pound, then you should have a ballpark figure for calories burned. Then dunk yourself in a vat of water and measure displacement. This would establish a ratio of LBM to calories burned. This hypothetical measurement would probably have some margin of error (no idea what it would be unless it were done among large enough populations of BBs and PLs) and it wouldn't really explain why a difference exists, just that it does. If only they had a study out there.

[tlcr1212]

I vote myofibrillar. Strength training has a goal of creating more muscle proteins. Muscles increase BMR because you must sustain the muscle cells with nutrients. Sarcoplasm (fluid) doesn't need to be sustained - sinews do. Furthermore, the testosterone created in growing muscles (NOT from fluid) should kick up the metabolism even higher. I'm pretty sure I can back that up, I'm just not willing to do that right now.

On the topic of increasing mitochondria - aerobic exercise? I thought all the studies on HIIT showed that it increased aerobic potential by, among other reasons, stimulating mitochondrial growth. Mitochondria help with the lactate threshold, no? I'm pulling this second paragraph out of my ass but I'm pretty sure I've read articles that say anaerobic exercise = more mitochondria.

[MidLifter]

I vote myofibrillar. Strength training has a goal of creating more muscle proteins. Muscles increase BMR because you must sustain the muscle cells with nutrients. Sarcoplasm (fluid) doesn't need to be sustained - sinews do. Furthermore, the testosterone created in growing muscles (NOT from fluid) should kick up the metabolism even higher. I'm pretty sure I can back that up, I'm just not willing to do that right now.

On the topic of increasing mitochondria - aerobic exercise? I thought all the studies on HIIT showed that it increased aerobic potential by, among other reasons, stimulating mitochondrial growth. Mitochondria help with the lactate threshold, no? I'm pulling this second paragraph out of my ass but I'm pretty sure I've read articles that say anaerobic exercise = more mitochondria.

I've read that too. lots of cardio=more cardio

I'm not sure when in a cardio session mitochondria are encouraged to grow, but I've read 45 min and 90 min do encourage such growth.

[tlcr1212]

I vote myofibrillar. Strength training has a goal of creating more muscle proteins. Muscles increase BMR because you must sustain the muscle cells with nutrients. Sarcoplasm (fluid) doesn't need to be sustained - sinews do. Furthermore, the testosterone created in growing muscles (NOT from fluid) should kick up the metabolism even higher. I'm pretty sure I can back that up, I'm just not willing to do that right now.

On the topic of increasing mitochondria - aerobic exercise? I thought all the studies on HIIT showed that it increased aerobic potential by, among other reasons, stimulating mitochondrial growth. Mitochondria help with the lactate threshold, no? I'm pulling this second paragraph out of my ass but I'm pretty sure I've read articles that say anaerobic exercise = more mitochondria.

I've read that too. lots of cardio=more cardio

I'm not sure when in a cardio session mitochondria are encouraged to grow, but I've read 45 min and 90 min do encourage such growth.

I agree with you that steady state cardio stimulates mitochondrial growth, but that's not what I meant - just didn't phrase it very well. I think anaerobic exercise also increases the # of mitochondria.