Clinical trial NCT05595564: Influence of PBM on Anaerobic Capacity Under Normoxia and Hypoxia
Official title: Influence of Photobiomodulation on Anaerobic Capacity Under Normoxia and Hypoxia Conditions in Treadmill Runners
Study type: INTERVENTIONAL
Overall status: UNKNOWN
Phase: NA
Conditions: Low Level Laser Therapy
Photobiomodulation
Performance
Sport
Keywords: Physical Therapy
Photobiomodulation
Athletic Performance
Hypoxia
Lead sponsor: University of Sao Paulo
Sponsor class: OTHER
First posted: 2022-10-27
Enrollment: 7
Sex: MALE
Minimum age (years): 18
Maximum age (years): 29
Standard ages: ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: OTHER

Brief summary: The photobiomodulation (PBM) shows positive results in muscle performance, fatigue reduction, management of blood lactate production, analgesia and in the increase of VO2 maximal, favoring the increase of ATP production and thus the energy metabolism. The association of PBM applied before high-intensity treadmill training shows physiological improvements both in normoxic (Nor) and hypoxic (Hip) conditions. Anaerobic capacity (AC) is the maximum amount of ATP that can be resynthesized by anaerobic metabolism and is an important predictor of high-intensity exercise since an athlete's ability to perform efforts to increase maximal oxygen consumption (VO2max) depends on AL. In view of the above information the main objective of the present research project will be to investigate the effects of PBM on AC under normoxic and hypoxic conditions in amateur runners. To test the effects of exercise training on anaerobic capacity under normoxic and hypoxic conditions, 7 individuals will be randomly submitted to four maximal efforts to exhaustion with intensity corresponding to 110% of VO2max in Hip, Nor, Hip+Ebio and Nor+Ebio conditions. These efforts will be used to estimate the AC, that is, the maximum accumulated deficit of alternative oxygen (MAODRED), from the sum of the energy contribution of the anaerobic and lactic metabolisms.


Eligibility criteria: Inclusion Criteria:

* healthy individuals
* VO2 maximal equal to or greater than 34 ml/kg.min
* capacity for physical activity according to the PAR-Q questionnaire

Exclusion Criteria:

* musculoskeletal injury in the last three months;
* cardiovascular diseases;
* use of anabolic, anti-inflammatory and analgesic drugs 72 hours before the evaluations;
* use of alcohol and illicit drugs during the collection period;

Primary outcomes:
measure: Analysis of excess oxygen consumption observed after exercise and blood lactate
timeFrame: 1 year
Secondary outcomes:
measure: Analysis of V02 max by a single supramaximal effort performed to exhaustion
timeFrame: 1 year
Other outcomes:
Locations:
city: Ribeirao Preto
country: Brazil
facility: University of Sao Paulo
state: Sao Paulo
Study officials:
affiliation: University of Sao Paulo
name: Carlos E Girasol, PhD
role: PRINCIPAL_INVESTIGATOR
References:
citation: Ferraresi C, Beltrame T, Fabrizzi F, do Nascimento ES, Karsten M, Francisco Cde O, Borghi-Silva A, Catai AM, Cardoso DR, Ferreira AG, Hamblin MR, Bagnato VS, Parizotto NA. Muscular pre-conditioning using light-emitting diode therapy (LEDT) for high-intensity exercise: a randomized double-blind placebo-controlled trial with a single elite runner. Physiother Theory Pract. 2015 Jul;31(5):354-61. doi: 10.3109/09593985.2014.1003118. Epub 2015 Jan 14.
citation: Ando S, Komiyama T, Sudo M, Higaki Y, Ishida K, Costello JT, Katayama K. The interactive effects of acute exercise and hypoxia on cognitive performance: A narrative review. Scand J Med Sci Sports. 2020 Mar;30(3):384-398. doi: 10.1111/sms.13573. Epub 2019 Oct 27.