Table 1. General characteristics of the subject

Characteristics	Healthy men group (n=11)	Group of men with weak abdominal muscles (n=11)
Age (year)	22.45±1.57	21.55±1.44
Height (cm)	173.91±2.39	172.91±2.47
Weight (kg)	67.00±4.02	69.64±3.80
Manual muscle test (grade)	4.82±0.40	2.45±0.52

Data are expressed as mean±SD.