High Intensity Kickboxing leads to more muscle mass???
I've been primal for about 2 months now. I have also changed my normal kickboxing routine to a high intensity one whereby I go all out for 30-40 seconds, rest for 15 and repeat 8 times.
I've noticed my waistline has shrunk yet my shirts are getting a bit snug around the chest and shoulders.
Could this new way of eating, combined with the high intensity kickboxing, be giving me more muscle without doing any resistance training?
I simply figured that kickboxing isn't really a 'muscle building' exercise. I was under the assumption that only resistance training builds muscle.
If a guy confined to a wheelchair for two years started walking again, he would build muscle mass in his legs simply by standing and walking. Resistance training might be ''optimal'' in the gym for building muscle mass, but depending on your level (beginners get more gains) and your hormonal profile, any exercise can do the trick, especially if it's not pure chronic cardio.