Which aspect is crucial for sustaining energy throughout a weightlifting session?

Optimal lifting technique is crucial for sustaining energy throughout a weightlifting session because it allows an athlete to perform movements efficiently and effectively, reducing unnecessary energy expenditure. When a lifter employs proper technique, they can optimize their biomechanics, which minimizes fatigue and maximizes the force they can produce. Good technique also reduces the risk of injury, allowing the athlete to train consistently without setbacks that could lead to a loss of energy or motivation to continue training.

Using the correct lifting technique helps in engaging the right muscle groups effectively, ensuring that the body's energy systems work harmoniously. This not only aids in lifting heavier weights safely but also means that the athlete can maintain a higher intensity with less effort over longer sessions, contributing to better overall performance.

Other factors, such as warm-up duration, weight selection, and the length of rest periods, are also important for performance but relate more to preparation and recovery rather than directly impacting energy sustainability during the lifts themselves. Proper technique provides a foundation that can help lifters maintain their energy and focus throughout their training.