Healthy Clinical Trial
Official title:
Cadence Modulation to Improve Well-Being, Kinematics and Aerobic Performance in Cyclists
This study will utilize a combination of cardiovascular analysis, 3D motion capture, and a software package, Metrifit, to monitor measures of well-being to comprehensively evaluate both the musculoskeletal and physiological responses following a HIIT training intervention at EOC as a means of improving performance and potentially reducing injury risk factors. This holistic approach of physiological and biomechanical factors is unprecedented. This is the first interventional study to determine the effect of high intensity training at EOC on cardiovascular performance, kinematics and well-being which may minimize risk of injury factors.
In the first session, each individual will be asked to fill out a questionnaire to regarding
cycling experience, prior bike fits (with data sheets when available), and injury history.
Maximal aerobic capacity (VO2max) will be determined. During the test, subjects will be asked
rate exertion. Before testing, the system will be calibrated with known oxygen and carbon
dioxide concentrations. During the test, subjects will be asked to breathe normally through a
low dead space bidirectional turbine. Inspired and expired gases will be analyzed for
concentrations of O2 and CO2, to determine alveolar gas exchange. Total ventilation (VE),
respiratory rate, oxygen consumption (VO2), carbon dioxide (VCO2) will be measured, and
respiratory exchange ratio (RER; VCO2/VO2) will be calculated continuously during the test
and expressed as a 30-second rolling average.
Participants will return 48 hours later, at which time EOC will be determined after a
moderate intensity prolonged cycling exercise (PCE) at seven different cadences. Cadences
from 50rpm to 110rpm will be randomly generated and introduced every 3 minutes, followed by a
3 minute cool down at FCC at 40% PP (Figure Subjects will then be pair matched by gender and
randomized into control (FCC) or EOC modulation groups.
48 hours following EOC testing, subject will return for a second progressive maximal cycling
test performed at FCC or EOC based on group assignment.
Subjects will then participate in a 6 week high intensity training (HIIT) indoor cycling
program at their prescribed cadence (FCC or EOC), using cadence meters. Training will consist
of three non-consecutive days each week for 60 min, and alternate between two HIIT workouts.
Resistance will be increased to meet the HIIT requirement, while cadence will remain at FCC
or EOC. Subjects will be asked to warm-up at a light (3/10) workload for 10 minutes, followed
by HIIT consisting of 4 minutes at an intensity of 8/10 on the modified Borg, and 90 seconds
recovery (2/10). This will be repeated 8 times, followed by 10 minutes of cool down. The
alternating HIIT workout will include a 10 minute warm up, followed by 12 intervals lasting 2
minutes at an RPE of 9/10 and 3 minutes of recovery. The session will conclude with a 10
minute cool down.
Within one week of completing their training program, subjects will return for their fourth
and final study visit, at which time a VO2max test and kinematic data collection will be
repeated at FCC or EOC.
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