For athletic development, it is recommended to train a major muscle group or movement pattern a minimum of once per week. twice per week. twice monthly. three times monthly.

twice per week

Explanation:

To strengthen all of the major muscle groups in an athletes body, it is required to exercise twice per week.

For muscle group training, it is necessary to give rest of 2 or 3 days to the muscles as muscle exercise exerts lots of strain on the muscles.

Hence, the correct answer is twice per week.

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