The effects of a reciprocal hip exercise on trunk flexion angle and sit-to-stand time in participants with flat backs.
Won-Gyu Yoo
PMID 30154584WHAT IT FOUND
Women with flat backs did a seated Thera-Band hip exercise and then had a larger trunk flexion angle and faster sit-to-stand time.
No control group was used, so the exercise itself cannot be proven responsible.
Key findings
01Trunk flexion angle was 81.6 ± 8.83° after reciprocal hip exercise vs. 75.9 ± 5.02° before (p<0.05).
02Sit-to-stand time was 1.40 ± 0.26 sec after reciprocal hip exercise vs. 1.85 ± 0.44 sec before (p<0.05).
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
Only 11 women with flat back were studied, so the results may not apply beyond this small, young group. The methods did not describe a control group, blinding, or random allocation, so the changes cannot be separated from time, practice, or other factors. The outcomes were trunk flexion angle and sit-to-stand time. The paper did not report pain, strength, balance, or adverse events. The authors infer muscle strengthening and improved dynamic balance, but the study measured angles and time, not muscle strength or dynamic balance. The exercise was 30 minutes per day for 15 days, and the paper did not report adherence.
Declared interests
The study was supported by the Basic Science Research Program through the National Research Foundation of Korea, funded by the Ministry of Education. The authors declared no conflict of interest.
The easy way to misread this
Do not conclude that the Thera-Band exercise caused the posture and sit-to-stand changes. The study had only one group, no control, and no blinding, so time, practice, or other factors could explain the results.