|（1.School of Physical Education，South China Normal University，Guangzhou 510006，China；2.School of Physical Education，Shaoguan University，Shaoguan 512005，China；3.School of Physical Education，Liupanshui Normal University，Liupanshui 553004，China)
Abstract: In order to probe into the effects of accumulated exercise on the chronic inflammation of visceral adipose tissue of obese rats and the affecting mechanism, the authors randomly divided 8-week old male SD rats, which were obesity induced with high fat diet and model established, into a high fat diet control group (B), an ordinary diet control group (C), a continuous exercise group (D), a medium intensity accumulated exercise group (E) , and a high intensity accumulated exercise group (F), each of which contains 8 rats, fed the rats in the exercise groups with ordinary diet, and set a normal body mass ordinary diet control group (A), which contains 6 rats. The exercise groups carried out 8-week treadmill training (0°, 5 d/w). Group D’s running speeds were 20 m/min (week 1-4) and 25 m/min (week 5-8), 60 min/times, 1 times/d. Group E’s running speeds were the same as group D’s, 12 min/times, 5 times/d, interval 60 min; Group F’s running speeds were 40 m/min (week 1-4) and 42 m/min (week 5-8), 6 min/times, 5 times/d, interval 60 min. All the exercise groups had the same total running distance. The authors measured body fat percentage, blood fat, adi-pose tissue inflammation index and macrophages M1 and M2 phenotypes at obesity model establishment and 48 h after the last training. Results: 1) the obese rats showed a blood fat disorder, the polarization of macrophages M1 and M2 phenotypes in visceral adipose tissue was unbalanced and showed a chronic inflammation condition; 2) in 8 weeks of exercise intervention, all the 3 plans can control weight, reduce fat, improve blood fat disorder and the unbalance of polarization of macrophages in visceral fat, and relieve the chronic inflammation condition; 3) the effects of weight control and fat reduction on the obese rats from strong to weak were as follows: continuous exercise, high intensity ac-cumulated exercise, medium intensity accumulated exercise; 4) the effects of regulation on the polarization of macro-phages in visceral adipose tissue of the obese rats from strong to weak were as follows: medium intensity accumulated exercise, continuous exercise, high intensity accumulated exercise. The results indicate that regular accumulated exer-cise can effectively reduce an obese body’s fat, improve blood fat metabolism, reduce the level of chronic inflammation of adipose tissue, its mechanism may be related to regulating the polarization of macrophages in visceral adipose tissue. Accumulated exercise is conducive to breaking the sedentary lifestyle, and its combination with continuous exercise may have a more comprehensive effect on health intervention.
Key words: sports medicine；obesity；accumulated exercise；polarization of macrophage；rat