Ever wondered why a marathon runner looks lean and thin in contrast to a sprint runner? Ever thought why an X country cyclist looks entirely shred compared to an Olympic-timed cyclist? The difference is workout intensity and duration.
Both burn calories for sure, however in both the cases, the former and latter have a science-backed explanation of how and why they look so different for quite a similar sport.
The human body is quite an adaptive collection of cells, and has thrived and evolved for centuries, it reacts to external changes by building its resilience to survive and protect itself from harm to sustain life. Exposing the body to various forms of resistance, such as weights and intensity, makes it go through a similar adapting and changing process, surviving another day.
The adapt and survive biology of our anatomy will bring our bodies to our desired shape and strength. If the workout is kept short and intense in terms of weights and fewer rest periods, it senses a heavy muscle strength and explosive lung capacity hence remoulding its inner self to develop and grow, which is more muscles and lung capacity.
On the contrary, marathons or endurance sports are seen by the inner genetic code to be more of a slow calorie requirement burn over a long period. Hence the body burns all the muscle, fat, and energy resources leaving nothing behind, suiting its marathon mode of survival. In simple words, an eagle hunts on short trips over long migratory birds. So decide if the eagles’ physical feature or the long migratory looks fits your needs.
I would lift heavy, short, and paint the town swell. Cheers