No relationship was identified between changes in weight and walking performance post-surgery .
Although physical activity performed after bariatric surgery is associated with enhanced weight loss outcomes , there is limited information on patients ' physical activity behaviour in this context .
This systematic review and meta- analysis assessed pre-operative to post-operative changes in physical activity and physical function outcomes among obese adults undergoing bariatric surgery .
Effect of Weight Loss on Aerobic Capacity in Patients with Severe Obesity Before and After Bariatric Surgery
Severe obesity has been associated with adverse effects on physical capacity . In a prospect i ve study , the aerobic capacity of severely obese patients was measured in order to observe the physiological response to weight loss from bariatric surgery .  Sixty-five consecutive patients ( 40.4 ± 8.4 years old ; 93.8 % female ; body mass index = 49.4 ± 5.4 kg/m2 ) were evaluated before bariatric surgery and then 6 and 12 months after surgery . Aerobic capacity was assessed with a scientific treadmill to measure maximal oxygen consumption ( VO2max ) , heart rate , blood pressure , time on the treadmill , and distance walked ( modified Bruce test )  . For the three observational periods , VO2max was 25.4 ± 9.3 , 29.8 ± 8.1 , and 36.7 ± 8.3 ml/kg/min ; time on the treadmill was 5.4 ± 1.4 , 6.4 ± 1.6 , and 8.8 ± 1.0 min ; and distance walked was 401.8 ± 139.1 , 513.4 ± 159.9 , and 690.5 ± 76.2 m. For these variables , significant results ( p = 0.0000 ) were observed for the two postoperative periods in relation to the preoperative period . Severely obese individuals increased their aerobic capacity after successful bariatric surgery . The data also suggests that a positive and progressive relationship between weight loss and improvement in fitness as a moderate loss of weight 6 months after surgery already showed some benefit and an additional reduction in weight was associated with a better performance in the aerobic capacity tests at the 12-month follow-up
No relationship was identified between changes in weight and walking performance post-surgery .
Although physical activity performed after bariatric surgery is associated with enhanced weight loss outcomes , there is limited information on patients ' physical activity behaviour in this context .
This systematic review and meta- analysis assessed pre-operative to post-operative changes in physical activity and physical function outcomes among obese adults undergoing bariatric surgery .