Question

Which of the following did you include in your response? Check all that apply.

For the first 3 seconds, the muscle cells use the ATP they have within them.

For the next 8-10 seconds, the muscles use creatine phosphate stores to provide ATP.

For the next 90 seconds, the body uses anaerobic respiration to provide ATP.

For the remainder of the race, the body uses aerobic respiration to provide ATP.

Answer 1

I don’t have your earlier message here, so I can’t say what I actually included before — please paste it if you want a direct check.

If you’re asking which of those statements are correct (i.e., commonly included in the standard, simplified timeline of muscle ATP sources), check all four. Brief caveats:
- The timing is approximate and overlaps: ATP stored in muscle fuels the first few seconds (often 1–3 s).
- Creatine phosphate (phosphocreatine) supplies rapid ATP for roughly the next ~5–10 s (often cited ≈8–10 s).
- Anaerobic glycolysis predominates for the next ~60–120 s (roughly “next 90 s” is a reasonable simplification).
- For longer exercise the aerobic system becomes dominant, but all systems contribute to some extent and transitions are gradual.