Graduate Program in Health Sciences, Federal University of Rio Grande do Norte, Natal, Brazil.
Graduate Program in Physical Education, Federal University of Rio Grande do Norte, Natal, Brazil.
Clin Interv Aging. 2020 Aug 21;15:1449-1460. doi: 10.2147/CIA.S260134. eCollection 2020.
To investigate the short-term effect of self-selected training intensity (SSTI) on ambulatory blood pressure (BP) in hypertensive older women.
This is a randomized, single-blind, two-arm, parallel-group controlled trial that included 40 medicated hypertensive older women (64.4±3.6 years; resting systolic 118±19 and diastolic BP 68±9 mmHg). SSTI intervention was performed three times per week, 30-50 minutes per session (n=20). The control group participated in health education meetings once per week (n=20). Ambulatory BP (primary outcome) and six-minute walking test performance (secondary outcome) were assessed at baseline and following 8 weeks of intervention. Heart rate (HR), rating of perceived exertion (RPE, 6-20), and affective valence (ie, feeling scale, -5/+5) were recorded during all SSTI sessions. Intention-to-treat and per-protocol analyses were used for data analyses.
Fifteen participants from the SSTI group and 17 from the control group completed the study. No differences in ambulatory BP (24-h, awake, and asleep) were observed between SSTI and control groups (intention-to-treat and per-protocol analyses; p>0.05). The SSTI group showed a greater six-minute walking test performance than the control group in the intention-to-treat and per-protocol analyses (p<0.05). The participants exercised at 52±10% of HR reserve reported an RPE of 11±1 and an affective valence of 3.4±1.1 over the 8-week period.
SSTI is a feasible approach to induce a more active lifestyle and increase health-related fitness in hypertensive older women, although it does not improve BP control over a short-term period.
研究自选择训练强度（SSTI）对高血压老年女性动态血压（BP）的短期影响。
这是一项随机、单盲、双臂、平行对照试验，纳入了 40 名服用药物的高血压老年女性（64.4±3.6 岁；静息收缩压 118±19mmHg，舒张压 68±9mmHg）。SSTI 干预每周进行 3 次，每次 30-50 分钟（n=20）。对照组每周参加一次健康教育会议（n=20）。在基线和干预 8 周后评估动态血压（主要结局）和 6 分钟步行试验表现（次要结局）。在所有 SSTI 期间记录心率（HR）、感觉用力程度（RPE，6-20）和情感效价（即感觉量表，-5/+5）。采用意向治疗和方案分析进行数据分析。
SSTI 组有 15 名参与者和对照组有 17 名参与者完成了研究。意向治疗和方案分析均显示，SSTI 组和对照组之间的动态血压（24 小时、清醒和睡眠时）无差异（p>0.05）。意向治疗和方案分析均显示，SSTI 组的 6 分钟步行试验表现优于对照组（p<0.05）。参与者在 8 周内以 52±10%的 HR 储备进行运动，报告 RPE 为 11±1，情感效价为 3.4±1.1。
SSTI 是一种可行的方法，可以促进高血压老年女性更积极的生活方式和提高健康相关的适应性，尽管它不能在短期内改善血压控制。
