Application of Beet-root Juice Supplementation and Photobiomodulation Treatment on Forearm Muscle Fatigue in Older Adults

Summary

The goal of this randomized counterbalanced repeated measures study is to test beet-root juice supplementation and red light therapy augment forearm muscle endurance in apparently healthy older adults over 65 years of age. The main questions seek to answer the following question: Does beet-root juice supplementation improve forearm muscle endurance compared to a placebo supplement? Does red light therapy improve forearm muscle endurance compared to a sham light exposure? Does beet-root juice supplementation in combination with red light therapy improve forearm muscle endurance compared to a placebo-sham light control?

Eligibility

Age range

65+ years

Sex

All

Healthy volunteers

Yes

Interventions

• Dietary Supplement
  Beet-root juice

  Two days prior to the forearm endurance protocol, participants will be provided and instructed to consume a 400mg nitrate once per day. On the day of the forearm endurance protocol, the participants will be provided and instructed to consume a third 400mg dose of nitrates at least 150 minutes before forearm endurance testing.

• Radiation
  red-light therapy

  Participants will place their dominant forearm 15 centimeters away from the light source and have their dominant forearm exposed to 660nm wave length light for 10-minutes.

• Dietary Supplement
  Placebo

  Two days prior to the forearm endurance protocol, participants will be provided and instructed to consume a nitrate depleted placebo once per day. On the day of the forearm endurance protocol, the participants will be provided and instructed to consume a third dose of the nitrate depleted placebo at least 150 minutes before forearm endurance testing.

• Radiation
  sham light

  Participants will place their dominant forearm 15 centimeters away from the light source and have their dominant forearm exposed to sham light for 10-minutes.

Location