European Journal of Applied Physiology

, Volume 108, Issue 1, pp 123–130

No effect of prior caffeine ingestion on neuromuscular recovery after maximal fatiguing contractions

  • Marius S. Fimland
  • Jan Helgerud
  • Andreas Knutsen
  • Helge Ruth
  • Gunnar Leivseth
  • Jan Hoff
Original Article

DOI: 10.1007/s00421-009-1198-z

Cite this article as:
Fimland, M.S., Helgerud, J., Knutsen, A. et al. Eur J Appl Physiol (2010) 108: 123. doi:10.1007/s00421-009-1198-z

Abstract

The purpose of this study was to test the hypothesis that prior caffeine ingestion would enhance neural recovery after isometric fatiguing maximal intermittent plantar flexions, and thus would enhance the recovery of voluntary muscle strength. After a familiarisation session, 13 males randomly participated in two experimental trials where they ingested either caffeine (~6 mg/kg) or identical placebo pills 1 h prior to testing. Subjects were tested for electromyogram (EMG) activity and evoked V-waves in the soleus and gastrocnemius medialis muscles. These measurements were obtained during brief plantar flexion maximum voluntary isometric contractions (MVICs), and normalised by the superimposed maximal M-wave (EMG/MSUP and V/MSUP, respectively), before and after (20 s, 10 min and 20 min) a fatigue protocol (seven 25 s MVICs, 5 s rest). There were no effects (P > 0.05) of caffeine ingestion on EMG/MSUP, V/MSUP, MVIC or MSUP. The central neural modulation (EMG/MSUP and V/MSUP) and voluntary strength changes followed a similar time-course with a substantial reduction 20 s post-fatigue and a gradual return towards baseline values.

Keywords

Central fatigue Muscle fatigue Electromyogram Plantar flexion Soleus Gastrocnemius Neural drive V-wave Caffeine 

Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • Marius S. Fimland
    • 1
    • 2
  • Jan Helgerud
    • 1
    • 3
  • Andreas Knutsen
    • 1
  • Helge Ruth
    • 1
  • Gunnar Leivseth
    • 4
    • 5
  • Jan Hoff
    • 1
    • 4
  1. 1.Department of Circulation and Imaging, Faculty of MedicineNorwegian University of Science and TechnologyTrondheimNorway
  2. 2.Faculty of Teacher Education and SportSogn og Fjordane University CollegeSogndalNorway
  3. 3.Hokksund Medical Rehabilitation CentreHokksundNorway
  4. 4.Department of Physical Medicine and RehabilitationSt. Olav’s University HospitalTrondheimNorway
  5. 5.National Centre of Comprehensive Occupational RehabilitationRaulandNorway

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