In a 10-30s maximal sprint effort, what proportion of ATP synthesis comes from glycolysis?Question 1Select one:a.60%b.90%c.45%d.15%

Breakdown the Problem

1. Identify the Duration: The question refers to a 10-30 second maximal sprint effort.
2. ATP Synthesis Pathways: Understand the sources of ATP production during high-intensity exercise.
3. Glycolysis Contribution: Analyze the proportion of ATP that is derived from glycolysis during this duration.

Relevant Concepts

1. Energy Systems: During maximal sprinting, the body relies on different energy systems:

   • Phosphocreatine (PCr) System: Provides immediate ATP for short bursts of activity.
   • Glycolytic System: Starts to provide ATP for efforts lasting from about 10 to 30 seconds.
   • Aerobic System: Generally contributes after longer durations.

2. Glycolysis Contribution: In 10-30 seconds of maximal effort, glycolysis becomes a significant source of ATP as the PCr system is depleted.

Analysis and Detail

1. Typical Energy Contribution:

   • In the first few seconds (0-10s), most ATP is generated through the PCr system.
   • As the sprint continues beyond 10 seconds, glycolysis contributes significantly to ATP production.
   • By the 30-second mark in a maximal sprint, it is estimated that glycolysis can provide a substantial percentage of ATP.

2. Proportional Estimate: Research indicates that around 60-90% of ATP production at this intensity and duration may come from glycolysis.

Verify and Summarize

1. Checking Options:
   • Option (a) 60% aligns with the understanding from exercise physiology.
   • Option (b) 90% is likely too high as it would neglect the rapid PCr supply.
   • Options (c) 45% and (d) 15% are too low for this duration of maximal effort.

Final Answer

The best estimate for the proportion of ATP synthesis from glycolysis during a 10-30s maximal sprint effort is (a) 60%.