Intraocular pressure during handgrip exercise: The effect of posture and hypercapnia in young males
| Autor: | Joshua T. Royal, Igor B. Mekjavic, Tamara Valencic, Tinkara Mlinar, Polona Jaki Mekjavic |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Adult
Male medicine.medical_specialty Intraocular pressure Supine position genetic structures Physiology medicine.medical_treatment visual impairment Ocular hypertension Isometric exercise Bed rest Head-Down Tilt Hypercapnia Young Adult Heart Rate Physiology (medical) Internal medicine Heart rate Prone Position Supine Position Humans QP1-981 Medicine head‐down tilt Exercise Weightlessness Simulation spaceflight‐associated neuro‐ocular syndrome Hand Strength business.industry Original Articles medicine.disease eye diseases Blood pressure Cardiology Original Article sense organs business Bed Rest intraocular pressure |
| Zdroj: | Physiological Reports, Vol 9, Iss 20, Pp n/a-n/a (2021) Physiological Reports |
| ISSN: | 2051-817X |
| DOI: | 10.14814/phy2.15035 |
| Popis: | Purpose As part of our investigations of intraocular pressure (IOP) as a potential contributing factor to the spaceflight‐associated neuro‐ocular syndrome using the 6° head‐down tilt (6°HDT) bed rest experimental model, we compared the effect of rest and isometric exercise in prone and supine 6°HDT positions on IOP with that observed in the seated position. Methods Ten male volunteers (age = 22.5 ± 3.1 yrs) participated in six interventions. All trials comprised a 10‐min rest period, a 3‐min isometric handgrip exercise at 30% of participant's maximum, and a 10‐min recovery period. The trials were conducted under normocapnic (NCAP) or hypercapnic (FICO2 = 0.01; HCAP) conditions, the latter mimicking the ambient conditions on the International Space Station. IOP, systolic and diastolic pressures, and heart rate (HR) were measured during the trials. Results Isometric exercise‐induced elevations in HR and mean arterial blood pressure. IOP in the prone 6°HDT position was significantly higher (p Intraocular pressure(IOP) in the prone 6 head‐down tilt (HDT) position was similar to IOP reported in astronauts upon entering microgravity, potentially indicating that prone, rather than supine 6°HDT position might be a more suitable experimental analog for investigating the acute ocular changes that occur in microgravity. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text