Clinical trial NCT04641117: Time Efficient Exercise to Reverse Sarcopenia and Improve Cardio-metabolic Health
Official title: Time Efficient Exercise to Reverse Sarcopenia and Improve Cardio-metabolic Health
Study type: INTERVENTIONAL
Overall status: NOT_YET_RECRUITING
Phase: NA
Conditions: Exercise Training and Sarcopenia
Lead sponsor: University of Texas at Austin
Sponsor class: OTHER
First posted: 2020-11-23
Enrollment: 60
Sex: ALL
Minimum age (years): 60
Maximum age (years): 80
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: NA
Intervention model: SINGLE_GROUP
Intervention model description: Subjects will power train
Primary purpose: TREATMENT

Brief summary: Participants will be 60-80 y men and women who vary their physical activity (steps/day) while their lipid metabolism is studied (n=24). Thereafter, another group (n=60) will perform 6 months of exercise training focused on developing maximal cycling power, during which their changes in muscle mass and practical function will be carefully measured.

Detailed description: In a society that is growing in the number of older adults who are also becoming more sedentary, it is critical to identify the types of exercise that harness significant health benefits. First, we hypothesize that older adults (60-80 y) need a certain background level of physical activity, judged by number of steps per day. This is important, especially to fat metabolism. Secondly, because older adults claim they don't have time to exercise, we have developed a time efficient program (10 min/day) that has shown promise for offsetting sarcopenia and significantly improving cardiovascular function.

Our Aim 1 is to determine the range of daily step counts in older adults (60-80 y; n=24) that is needed to prevent acute impairment of post-prandial fat metabolism, measured the morning after exercise. We have recently shown in young adults that when their level of background physical activity drops below the range of 5,000 - 8,500±500 steps/d, that they don't adapt positively to an acute 1 h bout of exercise (i.e.; 'exercise resistance') that normally improves fat metabolism.

Our Aim 2 is to determine the ability of a time-efficient 24-week program of exercise training for both maximal neuromuscular power and aerobic power to counteract sarcopenia and declines in aerobic power and functional tests in men and women 60-80 y. We have recently found in a preliminary study of older men and women (50-70 y) that performing multiple maximal 4 s sprints of rapid acceleration cycling bouts for only 8 weeks, eliciting maximal power, displayed significant (p\<0.05) increases in muscle thigh volume (MRI), whole body muscle mass, maximal neuromuscular power and peak oxygen consumption. We now propose to train older men and women (i.e.; 60-80 y; n=60) for longer durations (i.e.; 24 weeks) and describe the time course of adaptations. We will additionally monitor their background levels of daily physical activity and determine if it correlates with improvements in neuromuscular and cardiovascular function.

Eligibility criteria: Inclusion Criteria:

* relatively healthy

Exclusion Criteria:

* relatively unhealthy

Primary outcomes:
measure: Muscle mass
timeFrame: six months
measure: Post-prandial lipemia
timeFrame: one month
Secondary outcomes:
Other outcomes:
Locations:
city: Austin
country: United States
facility: University of Texas at Austin Human Performance Laboratory
state: Texas
Study officials:
References: