Fitness Lessons Health And Fitness 4

Question 1

What is the primary energy system used during a 400-meter sprint?

Accepted Answer

Glycolytic (lactic acid) system

Answer

A 400-meter sprint lasts roughly 45–60 seconds, relying mainly on anaerobic glycolysis to regenerate ATP rapidly.

Question 2

Which training method alternates short bursts of maximal effort with brief recovery periods?

Accepted Answer

High-intensity interval training (HIIT)

Answer

HIIT involves repeated bouts of near-maximal effort followed by short rest intervals, maximizing calorie burn and cardiovascular adaptation.

Question 3

A fitness professional notices a client's knees cave inward during squats. This is known as what?

Accepted Answer

Knee valgus

Answer

Knee valgus (knock-knee collapse) during squats indicates weak hip abductors or poor ankle mobility and increases injury risk.

Question 4

What does the term 'VO2 max' represent?

Accepted Answer

Maximum oxygen the body can use during intense exercise

Answer

VO2 max is the maximum rate of oxygen consumption measured during incremental exercise and is the gold standard of aerobic capacity.

Question 5

Which mineral is most critical for normal muscle contraction and nerve transmission?

Accepted Answer

Calcium

Answer

Calcium ions trigger the interaction between actin and myosin filaments, initiating every muscle contraction.

Fitness Lessons Practice Test