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- Title
Effects of negative air ions on oxygen uptake kinetics, recovery and performance in exercise: a randomized, double-blinded study.
- Authors
Nimmerichter, Alfred; Holdhaus, Johann; Mehnen, Lars; Vidotto, Claudia; Loidl, Markus; Barker, Alan
- Abstract
Limited research has suggested that acute exposure to negatively charged ions may enhance cardio-respiratory function, aerobic metabolism and recovery following exercise. To test the physiological effects of negatively charged air ions, 14 trained males (age: 32 ± 7 years; $$ \overset{\cdotp }{V}{\mathrm{O}}_{2 \max } $$: 57 ± 7 mL min kg) were exposed for 20 min to either a high-concentration of air ions (ION: 220 ± 30 × 10 ions cm) or normal room conditions (PLA: 0.1 ± 0.06 × 10 ions cm) in an ionization chamber in a double-blinded, randomized order, prior to performing: (1) a bout of severe-intensity cycling exercise for determining the time constant of the phase II $$ \overset{\cdotp }{V}{\mathrm{O}}_2 $$ response ( τ) and the magnitude of the $$ \overset{\cdotp }{V}{\mathrm{O}}_2 $$ slow component (SC); and (2) a 30-s Wingate test that was preceded by three 30-s Wingate tests to measure plasma [adrenaline] (ADR), [nor-adrenaline] (N-ADR) and blood [lactate] (B) over 20 min during recovery in the ionization chamber. There was no difference between ION and PLA for the phase II $$ \overset{\cdotp }{V}{\mathrm{O}}_2 $$ τ (32 ± 14 s vs. 32 ± 14 s; P = 0.7) or $$ \overset{\cdotp }{V}{\mathrm{O}}_2 $$ SC (404 ± 214 mL vs 482 ± 217 mL; P = 0.17). No differences between ION and PLA were observed at any time-point for ADR, N-ADR and B as well as on peak and mean power output during the Wingate tests (all P > 0.05). A high-concentration of negatively charged air ions had no effect on aerobic metabolism during severe-intensity exercise or on performance or the recovery of the adrenergic and metabolic responses after repeated-sprint exercise in trained athletes.
- Subjects
PHYSIOLOGICAL effects of anions; EXERCISE; BLIND experiment; AEROBIC metabolism; CARDIOPULMONARY system; CATECHOLAMINES
- Publication
International Journal of Biometeorology, 2014, Vol 58, Issue 7, p1503
- ISSN
0020-7128
- Publication type
Article
- DOI
10.1007/s00484-013-0754-8