Participating in a step aerobics class on Monday, a spinning class on Wednesday, and lap swimming on Friday is an example of which training technique for endurance?

Cross-training

Explanation:

Sports and fitness cross-training includes combining exercises to work out different components of the body.

Sometimes, some muscle groups work with one specific activity, but not others; cross-training seeks to remove this imbalance.

It's a full-body workout that combines aerobics, resistance training, and mobility.