Energy balance also has to do with whatâs going on in your cells. When youâre in a positive energy balance (more in than out) and when youâre in a negative energy balance (more out than in), everything from your metabolism, to your hormonal balance, to your mood is impacted.
Muscle injuries are very common in both professional and recreational athletes. They typically occur in muscles that cross two joints, during explosive activities such as sprinting, and when the athlete is suddenly increasing their exercise regimen (i.e., training camp).
Primary lower-body muscles used in both sprinting and jogging include the quadriceps, hamstrings, glutes, iliopsoas and calves. Although you hit the same muscles in both exercises, you activate more muscle fibers during a sprint than you do during a long jog, leading to increased muscle growth.