Since playing badminton requires quick movement, stretching muscle is very important to prevent your body from injury. Especially, the aged people's muscle and tendon become hard to follow the quick movement. Stretching is very effective before playing. Do it slowly, over 20 seconds, with abdominal breathing.
腿の表側を伸ばす。 Stretching outside of the femur
腿の裏側を伸ばす。 腰を伸ばす Stretching inside of femur. waist & hips


腰と腿を同時に伸ばす。 アキレス腱。 上腕二頭筋。 femur & waist at the same time Achilles' tendon brachium biceps


手首、前腕 (手の平側) 手首、前腕 (手の甲側) 手首・ 同左 wrist, the forearm wrist, the back of arm wrist



上腕三頭筋 肩・三角筋 肩、 肩、首 the upper arm shoulder, deltoid shoulder shoulder, neck




首、 体側
neck side of body

鼠径部 体側・腰 腰・腿の横~裏
the inguinal region side of body, waist side & back of waist, femur 


大腿四頭筋 大腿側面 大腿後面
thigh muscle side of thigh back of thigh