Tamu Nadu civil engineer Subas Vanchi says, "When it comes to working out, everyone has good days and bad days at the gym or on the trails. Running 10 miles may feel like 5 miles, or conversely, lifting 10 pounds may feel like 50 pounds. Either way, understanding what factors affect your exercise performance can help better prepare you for your workout, regardless of the circumstances."

At 5'8", 68 kgs, 23 years old, Subas will compete in Musclemania® India in December.