Practicing sports and physical exercise which help our body and health is recommended as the Hadeeth states: Surely, your body has right on you إنَّ لِجَسَدِكَ عليكَ حقّاً. Biharul Anwaar V.70, page 128.
Also (Surely, Allah Likes the strong person)إنَّ اللهَ يُحِبُّ الرجلَ القويّ. Biharul Anwaar , V.64, page 184.
Wassalam.