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The Effects of Ashwagandha in Endurance Exercise Performance

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ClinicalTrials.gov Identifier: NCT03596307
Recruitment Status : Active, not recruiting
First Posted : July 23, 2018
Last Update Posted : November 26, 2018
Sponsor:
Collaborators:
KU Leuven
ZB Sports Development BVBA
Information provided by (Responsible Party):
Arjuna Natural Limited

Brief Summary:
Ashwagandha (Withania Somnifera) is a widely used herb in Ayurvedic medicine for vitality and rejuvenation. This study investigates the effects of both acute and short-term oral supplementation of Shoden (Ashwagandha extract) intake on performance and rate of perceived exertion in high-intensity aerobic and anaerobic exercise.

Condition or disease Intervention/treatment Phase
Healthy Dietary Supplement: Ashwagandha extract Dietary Supplement: Placebo Not Applicable

Detailed Description:

Only a few clinical trials have looked at the effects of Ashwagandha in exercise and training. The studies had a dosage of 2 x 300 mg & 2 x 500 mg per day for 8 weeks and found to stimulate effects of strength training on muscle strength and muscle mass (Wankhede et al., 2015) and small increments in time to exhaustion and VO2max (Shenoy et al., 2012). However, the training intervention in both the studies were not adequately controlled and did not make a distinction between the acute and short-term effects of Ashwagandha intake.

Moreover, a lot of herbal supplements are commercially available containing majority of alkaloids and small amount of withaferine. European Food Safety Authority (EFSA) has categorized anaferine, anahygrine, withanine, sominiferine, somnine, tropine etc as toxic and harmful. Apart from alkaloids, withaferine A has also been categorized as cytotoxic lactones by EFSA. The Ashwagandha extract developed by Arjuna Natural Ltd is free from these alkaloids and is standardized to contain about 35% glycowithanolides.

This study will be a randomized, double blinded, placebo controlled, two treatment, crossover study and will be conducted in 2 phases ( acute & short term) with a total of 5 identical test sessions. Each test session involves a maximal incremental cycling test followed by a 90-sec maximal cycling performance test (day 1), and a 30-min simulated time-triaI on a cycling ergometer (day 2). Day 1 and day 2 are separated by a 24hr rest interval and for each subject it will be consistently scheduled on the same time of the day in order to eliminate a potential impact of diurnal variation in the results.


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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 12 participants
Allocation: Randomized
Intervention Model: Crossover Assignment
Intervention Model Description: Randomization 1:1. Acute phase study - Session 1 (2 days) ; Crossover; Session 2 ( 2 Days) Short Term Phase - Session 2 (Pretest), 16 day supplementation, Session 3 (Post test), Crossover; Session 4 (Pretest),16 day supplementation, Session 5 (Post test).
Masking: Double (Participant, Investigator)
Masking Description: Double blinded
Primary Purpose: Other
Official Title: The Effects of Ashwagandha In Endurance Exercise Performance
Actual Study Start Date : August 6, 2018
Estimated Primary Completion Date : December 2018
Estimated Study Completion Date : June 2019

Resource links provided by the National Library of Medicine


Arm Intervention/treatment
Experimental: Ashwagandha extract
180 mg Shoden once daily before breakfast for 2 days in Acute Phase and 16 days in Short Term Phase.
Dietary Supplement: Ashwagandha extract
Shoden 180 mg capsule.
Other Names:
  • Shoden
  • Withania somnifera extract

Dietary Supplement: Placebo
Placebo 180 mg (Sucrose) capsule.

Placebo Comparator: Placebo
180 mg identical placebo once daily before breakfast for 2 days in Acute Phase and 16 days in Short Term Phase.
Dietary Supplement: Ashwagandha extract
Shoden 180 mg capsule.
Other Names:
  • Shoden
  • Withania somnifera extract

Dietary Supplement: Placebo
Placebo 180 mg (Sucrose) capsule.




Primary Outcome Measures :
  1. Performance (mean power output (Watt)) [ Time Frame: 30-min simulated time trials ]
    Simulated time trial on cycling ergometer (Avantronic Cyclus2)


Secondary Outcome Measures :
  1. Rate of perceived exertion [ Time Frame: At the end of incremental VO2 max test ; halfway (15 min) and at the end (30 min) of the 30 min time trial; on cycling ergometer ]
    15-point Borg rating scale of perceived exertion (ranging from 6 to 20, where 6 means "no exertion at all",13-14 means "somewhat hard" and 20 means "maximal exertion".). A number is chosen from the scale by an individual that best describes their level of exertion during physical activity.

  2. Capillary Lactate [ Time Frame: Incremental VO2 max test - middle and at the end of each incremental step ; 90s VO2 max test - just before the start of the test and 4 min following exhaustion; 30-Min Time Trial - 5-min intervals ]
    Blood samples from earlobes (Lactate Pro1, Arkray, Japan)

  3. Oxygen Intake (VO2Max) [ Time Frame: Measured during Incremental, 90s, and 30 min time trial. ]
    Highest oxygen uptake rate measured over a 30-s time-interval at the end of the test.



Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 35 Years   (Adult)
Sexes Eligible for Study:   Male
Gender Based Eligibility:   Yes
Gender Eligibility Description:   Physically fit and involved in physical fitness training, or in individual or team sport activity for 2-4hours per week, or 3-6 hours per week for cycling
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • Males between 18 and 35 years old
  • Physically fit and involved in physical fitness training, or in individual or team sport activity for 2-4hours per week, or 3-6 hours per week for cycling
  • Body mass index between 18 and 25
  • Good health status confirmed by a medical screening

Exclusion Criteria:

  • Any kind of injury/pathology that is a contra-indication to perform high-intensity exercise.
  • Intake of any medication or nutritional supplement that is proven to affect exercise performance
  • Intake of analgetics, anti-oxidants, or anti-inflammatory agents from 2 weeks prior to the start of the study
  • More than 3 alcoholic beverages per day, including a maximum of one glass of wine per day
  • Blood donation within 3 months prior to the start of the study
  • Smoking
  • Involvement in elite athletic training at a semi-professional or professional level
  • Current participation in another research trial
  • Any other argument to believe that the subject is unlikely to successfully complete the full study protocol

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03596307


Locations
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Belgium
KU Leuven Athletic Performance Center / Bakala Academy
Leuven, Heverlee, Belgium, BE3001
Sponsors and Collaborators
Arjuna Natural Limited
KU Leuven
ZB Sports Development BVBA
Investigators
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Principal Investigator: Peter Hespel, Prof Department of Kinesiology - KU Leuven

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Responsible Party: Arjuna Natural Limited
ClinicalTrials.gov Identifier: NCT03596307     History of Changes
Other Study ID Numbers: AN-07SHO 0518H1-ULE02
First Posted: July 23, 2018    Key Record Dates
Last Update Posted: November 26, 2018
Last Verified: November 2018
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Undecided
Plan Description: Data sharing can be carried out through a proper research proposal to the scientific review board of Arjuna Natural Ltd except in cases where Arjuna Natural Ltd. has no legal authority because the product has been out-licensed to another company or there is no feasible means to anonymise the data and redact personally identifiable information without compromising the privacy and confidentiality of research participants.

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No

Keywords provided by Arjuna Natural Limited:
Ashwagandha
Endurance
VO2 max
Glycowithanolides
Shoden