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Can resistance training increases muscle oxidative capacity and capillary number?

 As written in the previous articles, Endurance training increases oxidative capacity (Increases in mitochondrial number) and the antioxidant capacity in the exercised muscle fibers. Endurance training also promotes the formation of new capillaries and therefore increases in muscle capillarization and exchange of gases. But we have got a question from one of my colleague

Does resistance training also promotes these changes in the trained muscle?

To answer this question is "Unclear", while some studies shows 'resistance training reduces mitochondrial content in the muscle', whereas some other studies shows 'no change in muscle oxidative capacity' and still other investigation conclude that 'resistance training can promote small increases in muscle oxidative capacity'. And all these findings are similar for capillarization also.

what is the explanation for these divergent results?

we can say numerous factors for these findings which includes frequency of training, the duration of training, number of repetitions performed during training and so on.

So, what will be the relevant exercise prescription to promote these changes through resistance training?

Number of studies incorporated long duration resistance training programs and high frequencies of training (3 days per week) and high volume (product of reps*sets*resistance) of exercise reported small improvements in muscle oxidative capacity and increases number of capillaries is dependent upon the frequency and volume of the training programs.

* Muscle oxidative capacity( amount of oxygen consumed per gram of muscle)

*Capillaries ( A tiny blood vessels connecting artery and vein, where exchange of gases occurs. These blood vessels carry oxygen and nutrients to individual cells throughout the body


In the bottom line,

The exact explanation for this question is unclear because of the numerous factors plays in these divergent findings. If you want to increase muscle oxidative capacity and capillary numbers then incorporate high frequency resistance training with high volume based on your periodization of training and individual goal. consult with your exercise professional and physician before modifying the intensity of your training program.

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