This document discusses the physiological energy sources used in different types of sports. It outlines that there are three main energy systems: the phosphagen system which powers explosive activities lasting seconds; the anaerobic system which fuels activities lasting a few minutes; and the aerobic system which sustains endurance activities lasting more than 10-15 minutes. Weightlifting and sprinting rely mainly on the phosphagen system, while middle distance athletes utilize the anaerobic system and endurance athletes depend on the aerobic system. Team sports require energy from all three systems. The document provides an overview of the biochemical processes and fuel sources that power muscle energy metabolism during exercise.

1. Physiological Energy
Source in Sports
Arindam Sain
(M.Sc. Human Physiology, CSIR- JRF)

2. Thinking about Sports??...... Think about
the Energy Source

3. Energy Metabolism
Immediate Phosphagen System
Short-term anaerobic system
Long-term aerobic system
Sports

4. Weightliftin
g Explosive
power
Lasts a
few
seconds
Muscle
mass
and size

5. Sprinting
• Power
• Lasts ~ 20 seconds
• Phosphagen system
• Creatine
Supplementation

6. M.B. Cooke and P.J. Cribb, 2015

7. American Physiological
Muscleenergymetabolismduringintenseexercise
Phosphocreatine
(PCr)
Glycolysis
Oxidative
Phosphorylation

8. Middle Distance Athletes
• Lasts a few minutes
• Short-term anaerobic system
• Lactate↑ → Acidification↑ →
Intensity↓
• Buffering agents

9. Endurance Athlete
• Long-term aerobic system
• Lasts more than 10-15 mins to hours
• Cardiovascular & Respiratory system
are vital
• Carbohydrates

10. ATP resynthesis
Substrate-level phosphorylation
PCr + ADP + H+ → ATP + creatine
2 ADP → ATP + AMP
Glycogen + 3 ADP → 2 lactate + 2 H+ +
3 ATP
Oxidative phosphorylation
Glucose + 6 O2 + 36 ADP → 6 CO2 + 6
H2O + 36 ATP
Palmitate + 23 O2 + 130 ADP → 16
CO2 + 16 H2O + 130 ATP
Energy Provision in Skeletal Muscle during Exercise
Brendan Egan and Juleen R. Zierath, 2013

11. …..and Finally the Game Player
• Football, Hockey, Cricket, Tennis,
Rugby
• Lasts longer
• Each and every energy system is
required

12. Major sources of Carbohydrate & Fat during exercise.
Mark Hargreaves & Lawrence L. Spriet, 2020

13. Thank You