scholarly journals Adherence to and satisfaction with low-intensity physical activity and supervised moderate-high intensity exercise during chemotherapy for breast cancer

2019 ◽  
Vol 28 (5) ◽  
pp. 2115-2126 ◽  
Author(s):  
Hanna van Waart ◽  
Laurien M. Buffart ◽  
Martijn M. Stuiver ◽  
Wim H. van Harten ◽  
Gabe S. Sonke ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Physical Activity ◽  
High Intensity ◽  
High Intensity Exercise ◽  
Low Intensity ◽  
Intensity Physical Activity

Physical-work ability and chronic musculoskeletal complaints are related to leisure-time physical activity: Cross-sectional study among manual workers aged 50–70 years

2019 ◽  
Vol 47 (3) ◽  
pp. 375-382 ◽  
Author(s):  
Kristoffer L. Norheim ◽  
Afshin Samani ◽  
Jakob Hjort Bønløkke ◽  
Øyvind Omland ◽  
Pascal Madeleine
Keyword(s):  
Physical Activity ◽  
Work Ability ◽  
High Intensity ◽  
Leisure Time ◽  
Leisure Time Physical Activity ◽  
Physical Work ◽  
Musculoskeletal Complaints ◽  
Low Intensity ◽  
Intensity Physical Activity ◽  
Physical Work Ability

Aims: To investigate the associations between both high- and low-intensity leisure-time physical activity on physical-work ability and chronic musculoskeletal complaints among manual workers aged 50–70 years. Methods: In this cross-sectional study, 1763 manual workers (mean age 57.1, SD ± 4.7 years) replied to questions about leisure-time physical activity, physical-work ability, chronic musculoskeletal complaints as well as health and lifestyle factors. Ordinal and binomial logistic regression models were constructed to assess the influence of the duration of both low- and high-intensity physical activity on physical-work ability and chronic musculoskeletal complaints, respectively. Models were adjusted for gender, age, smoking, alcohol intake, body mass index, physical-work demand, work experience, chronic disease and, regarding physical-work ability, also for chronic musculoskeletal complaints. Results: A statistically significant association between greater physical-work ability and high-intensity physical activity was found for workers engaged in 3–4 h/wk and ⩾ 5 h/wk (OR 1.59, 95% CI 1.15–2.19 and OR 1.56, 95% CI 1.10–2.22, respectively). For both high- and low-intensity physical activity, a duration of 3–4 h/wk was associated with lower odds of reporting chronic musculoskeletal complaints in the knees (OR 0.65, 95% CI 0.42–1.00 and OR 0.61, 95% CI 0.38–0.99, respectively). Conclusions: Engaging in ⩾ 3 h/wk of high-intensity leisure-time physical activity was associated with greater physical-work ability among manual workers aged 50–70 years. Both high- and low-intensity physical activity related to lower odds of having chronic musculoskeletal complaints in the knees.

High-intensity versus low-intensity physical activity or exercise in patients with hip or knee osteoarthritis

2012 ◽  
Author(s):  
Jean-Philippe Regnaux ◽  
Ludovic Trinquart ◽  
Isabelle Boutron ◽  
Christelle Nguyen ◽  
Lucie Brosseau ◽  
...  
Keyword(s):  
Physical Activity ◽  
Knee Osteoarthritis ◽  
High Intensity ◽  
Low Intensity ◽  
Intensity Physical Activity

Effect of Low-Intensity Physical Activity and Moderate- to High-Intensity Physical Exercise During Adjuvant Chemotherapy on Physical Fitness, Fatigue, and Chemotherapy Completion Rates: Results of the PACES Randomized Clinical Trial

2015 ◽  
Vol 33 (17) ◽  
pp. 1918-1927 ◽  
Author(s):  
Hanna van Waart ◽  
Martijn M. Stuiver ◽  
Wim H. van Harten ◽  
Edwin Geleijn ◽  
Jacobien M. Kieffer ◽  
...  
Keyword(s):  
Physical Activity ◽  
Adjuvant Chemotherapy ◽  
High Intensity ◽  
Exercise Program ◽  
Completion Rates ◽  
Low Intensity ◽  
Activity Program ◽  
Home Based ◽  
Intensity Physical Activity

Purpose We evaluated the effectiveness of a low-intensity, home-based physical activity program (Onco-Move) and a moderate- to high-intensity, combined supervised resistance and aerobic exercise program (OnTrack) versus usual care (UC) in maintaining or enhancing physical fitness, minimizing fatigue, enhancing health-related quality of life, and optimizing chemotherapy completion rates in patients undergoing adjuvant chemotherapy for breast cancer. Patients and Methods We randomly assigned patients who were scheduled to undergo adjuvant chemotherapy (N = 230) to Onco-Move, OnTrack, or UC. Performance-based and self-reported outcomes were assessed before random assignment, at the end of chemotherapy, and at the 6-month follow-up. We used generalized estimating equations to compare the groups over time. Results Onco-Move and OnTrack resulted in less decline in cardiorespiratory fitness (P < .001), better physical functioning (P ≤ .001), less nausea and vomiting (P = .029 and .031, respectively) and less pain (P = .003 and .011, respectively) compared with UC. OnTrack also resulted in better outcomes for muscle strength (P = .002) and physical fatigue (P < .001). At the 6-month follow-up, most outcomes returned to baseline levels for all three groups. A smaller percentage of participants in OnTrack required chemotherapy dose adjustments than those in the UC or Onco-Move groups (P = .002). Both intervention groups returned earlier (P = .012), as well as for more hours per week (P = .014), to work than the control group. Conclusion A supervised, moderate- to high-intensity, combined resistance and aerobic exercise program is most effective for patients with breast cancer undergoing adjuvant chemotherapy. A home-based, low-intensity physical activity program represents a viable alternative for women who are unable or unwilling to follow the higher intensity program.

Roles of intensity and duration of nocturnal exercise in causing phase delays of human circadian rhythms.

1997 ◽  
Vol 273 (3) ◽  
pp. E536 ◽  
Author(s):  
O M Buxton ◽  
S A Frank ◽  
M L'Hermite-Balériaux ◽  
R Leproult ◽  
F W Turek ◽  
...  
Keyword(s):  
Physical Activity ◽  
Circadian Rhythms ◽  
High Intensity ◽  
Real Life ◽  
Phase Shifts ◽  
High Intensity Exercise ◽  
Moderate Intensity ◽  
Low Intensity ◽  
Human Circadian Rhythms ◽  
Low Intensity Exercise

To determine the roles of intensity and duration of nocturnal physical activity in causing rapid phase shifts of human circadian rhythms, eight healthy men were studied three times under constant conditions with no exercise, a 3-h bout of moderate-intensity exercise, or a 1-h bout of high-intensity exercise. Exercise stimulus was centered at 0100. Circadian phase was estimated from the onsets of the nocturnal elevation of plasma thyrotropin (TSH) and melatonin. Mean phase shifts of TSH onsets were -18 +/- 8 (baseline), -78 +/- 10 (low-intensity exercise, P < 0.01), and -95 +/- 19 min (high-intensity exercise, P < 0.01). Mean phase delays of melatonin onsets were -23 +/- 10 (baseline), -63 +/- 8 (low-intensity exercise, P < 0.04), and -55 +/- 15 min (high-intensity exercise, P < 0.12). Taken together with our previous findings, this study indicates that nocturnal physical activity may phase delay human circadian rhythms and demonstrates that phase-shifting effects may be determined with exercise durations and intensities compatible with the demands of a real-life setting.

High-intensity versus low-intensity physical activity or exercise in people with hip or knee osteoarthritis

2015 ◽  
Author(s):  
Jean-Philippe Regnaux ◽  
Marie-Martine Lefevre-Colau ◽  
Ludovic Trinquart ◽  
Christelle Nguyen ◽  
Isabelle Boutron ◽  
...  
Keyword(s):  
Physical Activity ◽  
Knee Osteoarthritis ◽  
High Intensity ◽  
Low Intensity ◽  
Intensity Physical Activity

scholarly journals Perceived Exertion in Physical Activity Measurement Across the Lifecourse: Results from SWAN

2021 ◽  
Vol 5 (Supplement_1) ◽  
pp. 902-903
Author(s):  
Kelly Ylitalo ◽  
Carrie Karvonen-Gutierrez ◽  
Barbara Sternfeld ◽  
Kelley Pettee Gabriel
Keyword(s):  
Physical Activity ◽  
High Intensity ◽  
Perceived Exertion ◽  
Absolute Intensity ◽  
Individual Characteristics ◽  
High Intensity Exercise ◽  
Moderate Intensity ◽  
Adult Women ◽  
Low Intensity ◽  
Perceived Intensity

Abstract Physical activity (PA) guidelines recommend 150 minutes of moderate-intensity or 75 minutes of vigorous-intensity PA, in addition to muscle strengthening activities, each week. Many questionnaires ascertain PA frequency, duration, and intensity to benchmark achievement of PA recommendations. However, most scoring algorithms utilize absolute intensity estimates when exertion may be influenced by age or other sociodemographic or health characteristics. This study compared PA estimates with and without adjustments for perceived exertion and determined if that difference was associated with individual characteristics. Women (n=2,711) from the longitudinal Study of Women’s Health Across the Nation who completed ≥3 Kaiser Physical Activity Surveys (KPAS) across 8 biennial visits were included (baseline age: 46.4±2.7 years). KPAS responses were converted to metabolic equivalent of a task (METs) using the Compendium of Physical Activities to estimate absolute and perceived intensity-adjusted MET values. Latent class growth modeling identified subgroups of participants following similar patterns of change in the difference between absolute intensity-based and perceived intensity-adjusted estimates across time. Four major trajectory classes emerged with patterns reflecting: (1) lessening high-intensity exercise (2.2%); (2) increasingly high-intensity exercise (3.1%); (3) consistently moderate-intensity exercise (92.0%); and (4) consistently low-intensity exercise (2.8%). Consistently low-intensity exercisers, for whom absolute intensity-based estimates exceeded perceived intensity-adjusted estimates, were more likely to be Japanese or Chinese (p&lt;0.001) and have lower BMI (p=0.05). However, for most participants, absolute intensity-based estimates approximated perceived intensity-adjusted estimates over time, suggesting that traditional PA scoring techniques may provide sufficient estimates for PA in longitudinal cohort studies of mid-life and older adult women.

Phenylephrine decreases frontal lobe oxygenation at rest but not during moderately intense exercise

2010 ◽  
Vol 108 (6) ◽  
pp. 1472-1478 ◽  
Author(s):  
Patrice Brassard ◽  
Thomas Seifert ◽  
Mads Wissenberg ◽  
Peter M. Jensen ◽  
Christian K. Hansen ◽  
...  
Keyword(s):  
Frontal Lobe ◽  
High Intensity ◽  
Sympathetic Activity ◽  
Near Infrared ◽  
Cerebral Metabolism ◽  
High Intensity Exercise ◽  
Mean Flow ◽  
Intense Exercise ◽  
Low Intensity ◽  
Low Intensity Exercise

Whether sympathetic activity influences cerebral blood flow (CBF) and oxygenation remains controversial. The influence of sympathetic activity on CBF and oxygenation was evaluated by the effect of phenylephrine on middle cerebral artery (MCA) mean flow velocity ( Vmean) and the near-infrared spectroscopy-derived frontal lobe oxygenation (ScO2) at rest and during exercise. At rest, nine healthy male subjects received bolus injections of phenylephrine (0.1, 0.25, and 0.4 mg), and changes in mean arterial pressure (MAP), MCA Vmean, internal jugular venous O2 saturation (SjvO2), ScO2, and arterial Pco2 (PaCO2) were measured and the cerebral metabolic rate for O2 (CMRO2) was calculated. In randomized order, a bolus of saline or 0.3 mg of phenylephrine was then injected during semisupine cycling, eliciting a low (∼110 beats/min) or a high (∼150 beats/min) heart rate. At rest, MAP and MCA Vmean increased ∼20% ( P < 0.001) and ∼10% ( P < 0.001 for 0.25 mg of phenylephrine and P < 0.05 for 0.4 mg of phenylephrine), respectively. ScO2 then decreased ∼7% ( P < 0.001). Phenylephrine had no effect on SjvO2, PaCO2, or CMRO2. MAP increased after the administration of phenylephrine during low-intensity exercise (∼15%), but this was attenuated (∼10%) during high-intensity exercise ( P < 0.001). The reduction in ScO2 after administration of phenylephrine was attenuated during low-intensity exercise (−5%, P < 0.001) and abolished during high-intensity exercise (−3%, P = not significant), where PaCO2 decreased 7% ( P < 0.05) and CMRO2 increased 17% ( P < 0.05). These results suggest that the administration of phenylephrine reduced ScO2 but that the increased cerebral metabolism needed for moderately intense exercise eliminated that effect.

scholarly journals It’s about Time: Effects of Physical Exertion on Duration Estimates

2019 ◽  
Vol 4 (1) ◽  
pp. 6
Author(s):  
Britton W. Brewer ◽  
Lawrence O. Schwartz ◽  
Allen E. Cornelius ◽  
Judy L. Van Raalte ◽  
Edmundo L. Urbina ◽  
...  
Keyword(s):  
Physical Activity ◽  
High Intensity ◽  
Perceived Exertion ◽  
Physical Exertion ◽  
Fundamental Aspect ◽  
Time Effects ◽  
Task Duration ◽  
Low Intensity ◽  
D Values ◽  
And Task

Background: Task duration is a fundamental aspect of exercise, but little is known about how completed bouts of physical activity are perceived. Consequently, the purpose of the five experiments conducted for this investigation was to examine the effects of engaging in physical tasks on retrospective duration estimates with college student participants. Methods: Across the five experiments, participants were 113 college students (82 women, 31 men). In Experiments 1 and 2, participants provided duration estimates of a period spent engaging in physical activity or rest. In Experiments 3, 4, and 5, participants provided duration estimates of periods spent engaged in physical tasks of high intensity and low intensity. Results: In Experiments 1, 2, and 3, participants engaged in physical activity tended to perceive durations as shorter than participants at rest. When completing less familiar tasks (Experiments 4 and 5), however, participants recalled a high intensity bout of physical activity as lasting longer than a low intensity bout of physical activity of comparable duration. Cohen’s d values for physical activity effects on duration estimates ranged from 0.40 to 1.60. Conclusion: The findings, which partially support a contextual-change interpretation, suggest that factors, such as perceived exertion and task familiarity, affect retrospective duration estimates.

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