Which activity is mainly a strength training exercise? doing push-ups and pull-ups playing in a softball game running and jumping rope swimming laps in a pool?

The correct answer is- doing push-ups and pull-ups

Explanation:

Push up and pull-ups are mainly a strength training exercise and improves the upper body strength if done regularly and in the right way. Pectoral muscles, triceps, shoulder, chest and abdomen muscles can be strengthened by doing push ups and pull-ups.

As strength is one of the important components of physical fitness so to improve the strength push-ups and pull-ups are very effective exercises. It also improves the digestion and physical posture of the body if performed in the right manner.  

Therefore the correct answer is- doing push-ups and pull-ups.

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