In:
Medicine & Science in Sports & Exercise, Ovid Technologies (Wolters Kluwer Health), Vol. 51, No. 11 ( 2019-11), p. 2193-2200
Abstract:
This trial aimed to demonstrate the feasibility of high-intensity interval training (HIIT) in postmenopausal, overweight/obese women at high risk of invasive breast cancer and to explore HIIT on changes in cardiorespiratory fitness (CRF), body weight, and body mass index (BMI) compared with moderate-intensity continuous training (MICT) and usual care (UC). Methods Forty-four women were randomized to HIIT, MICT, or UC for a 12-wk, thrice weekly, supervised exercise intervention. HIIT included a 5-min warm-up at 50%–70% HR peak , four cycles of 4 min at 90%–100% HR peak , followed by 3 min at 50%–70% HR peak . MICT consisted of 41 min at 60%–70% HR peak . Feasibility was assessed by consent, adherence, compliance, and retention rates. CRF, body weight, and BMI were measured at baseline and end of study. Repeated-measures linear mixed models were used to assess within- and between-group differences. Results Average age was 63.9 ± 8.8 yr. BMI was 30.9 ± 5.7 kg·m −2 . Participants completed 90% and 89% of HIIT and MICT workouts, respectively, with 100% compliance to the exercise prescriptions. No serious adverse events were reported. Compared with MICT and UC, HIIT exhibited improvements in change in treadmill time (101 s greater than MICT, and 125 s greater than UC, respectively, P 〈 0.001). Compared with UC, HIIT exhibited improvement in changes in absolute and relative V˙O 2peak (a 0.15-L·min −1 increase, P = 0.005, and a 2.3-mL·kg −1 ⋅min −1 increase, P = 0.004). There were no significant differences between groups for body weight or BMI ( P 〉 0.05). Conclusions HIIT is feasible, safe, and seems to promote greater improvements in CRF compared with MICT and UC in women at high risk for breast cancer.
Type of Medium:
Online Resource
ISSN:
1530-0315
,
0195-9131
DOI:
10.1249/MSS.0000000000002048
Language:
English
Publisher:
Ovid Technologies (Wolters Kluwer Health)
Publication Date:
2019
detail.hit.zdb_id:
2031167-9
SSG:
31
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