The purpose of this study is to evaluate changes in force and power production, soreness, inflammation, and oxidative stress after repeated sprinting activity and powdered tart cherry ingestion in trained males and females.
The purpose of this study is to evaluate changes in force and power production, soreness, inflammation, and oxidative stress after repeated sprinting activity and powdered tart cherry ingestion in trained males and females. This study will utilize a randomized, double-blind, placebo group study design. Prior to any data collection, potential participants will be explained the protocol and then review and sign an IRB-approved consent form. Healthy male and female (n=40) participants who report regularly practicing or competing in high-intensity multi-modal resistance based exercise will complete the study protocol.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
OTHER
Masking
DOUBLE
Enrollment
40
Tart Cherry Extract Powder (ADSO Naturals). Dispensed during visit 1. Participants will consume 1 dose per day for 10 days.
Rice power placebo. Dispensed during visit 1. Participants will consume 1 dose per day for 10 days.
Exercise and Performance Nutrition Laboratory
Saint Charles, Missouri, United States
Counter movement Jump Height
Jump height from counter movement jump
Time frame: 10 days
Counter movement jump peak propulsive force (N)
Peak propulsive force (N) from counter movement jump
Time frame: 10 days
Counter movement jump relative breaking force (N)
relative breaking force (N/kg) from counter movement jump
Time frame: 10 days
Isokinetic knee extension maximal voluntary contraction.
Peak isokinetic knee extension force (N) from a isokinetic knee extension exercise using a Biodex System 3
Time frame: 10 days
Isometric mid-thigh pull maximal voluntary contraction
Isometric maximal voluntary contraction peak force will be measured using an isometric mid-thigh pull assessment. Peak force production will be measured in Newtons.
Time frame: 10 days
Perceived recovery Visual Analog Scale
Perceived recovery Visual Analog Scale ranging from 0 (worst) to 100 (best)
Time frame: 10 days
Perceived soreness Visual Analog Scale
Perceived soreness Visual Analog Scale ranging from 0 (worst) to 100 (best)
Time frame: 10 days
Pain to Pressure threshold
Pain to Pressure threshold from algometry (higher = less sore). Minimum values are 0 N, maximum values are 110 N
Time frame: 10 days
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Changes in Creatine Kinase concentrations
Changes in Creatine kinase concentrations following damaging exercise
Time frame: 10 days
Changes in Creatine Kinase-myocardial band concentrations
Changes in Creatine kinase-myocardial band concentrations following damaging exercise
Time frame: 10 days
Sprint time
Fastest and average sprint time during 15 30-meter sprint recorded using digitally timed timing gates
Time frame: Baseline
Peak power
Peak power during a wingate anaerobic test
Time frame: 10 days
Changes in Protein carbonyls concentration
Protein carbonyls concentration changes
Time frame: 10 days
Changes in 8-isoprostane concentration
8-isoprostane concentration changes
Time frame: 10 days
Changes in testosterone-cortisol ratio
Testosterone-cortisol ratio changes
Time frame: 10 days
Changes in TNF-alpha concentration
Changes in TNF-alpha concentration
Time frame: 10 days
Changes in IL-6 concentration
Changes in IL-6 concentration
Time frame: 10 days
Changes in IL-10 concentration
Changes in IL-10 concentration
Time frame: 10 days
Desire to exercise visual analog scale
Desire to exercise visual analog scale (0 = not ready to train, 100 = very ready to train)
Time frame: 10 days
Pittsburgh sleepiness Scale Score
Pittsburgh sleepiness Scale Score (lower scores indicate higher level of sleepiness)
Time frame: 10 days
Changes in Uric Acid Concentrations
Changes in Uric Acid concentrations
Time frame: 10 days