title: Relationships between rating-of-perceived-exertion- and heart-rate-derived internal training load in professional soccer players: a comparison of on-field integrated training sessions.
abstract: OBJECTIVE
  To describe the internal training load (ITL) of common training sessions performed during a typical week and to determine the relationships between different indicators of ITL commonly employed in professional football (soccer).
  
  
  METHODS
  Session-rating-of-perceived-exertion TL (sRPE-TL) and heart-rate- (HR) derived measurements of ITL as Edwards TL and Stagno training impulses (TRIMPMOD) were used in 9 players during 3 periods of the season. The relationships between them were analyzed in different training sessions during a typical week: skill drills/circuit training + small-sided games (SCT+SSGs), ball-possession games+technical-tactical exercises (BPG+TTE), tactical training (TT), and prematch activation (PMa).
  
  
  RESULTS
  HR values obtained during SCT+SSGs and BPG+TTE were substantially greater than those in the other 2 sessions, all the ITL markers and session duration were substantially greater in SCT+SSGs than in any other session, and all ITL measures in BPG+TTE were substantially greater than in TT and PMa sessions. Large relationships were found between HR>80% HRmax and HR>90% HRmax vs sRPE-TL during BPG+TTE and TT sessions (r=.61-.68). Very large relationships were found between Edwards TL and sRPE-TL and between TRIMPMOD and sRPE-TL in sessions with BPG+TTE and TT (r=.73-.87). Correlations between the different HR-based methods were always extremely large (r=.92-.98), and unclear correlations were observed for other relationships between variables.
  
  
  CONCLUSIONS
  sRPE-TL provided variable-magnitude within-individual correlations with HR-derived measures of training intensity and load during different types of training sessions typically performed during a week in professional soccer. Caution should be applied when using RPE- or HR-derived measures of exercise intensity/load in soccer training interchangeably.
authors.affiliation: Real Club Recreativo de Huelva SAD, Huelva, Spain.
authors.forename: Miguel Angel
authors.initials: MA
authors.lastname: Campos-Vazquez
authors.forename: Alberto
authors.initials: A
authors.lastname: Mendez-Villanueva
authors.forename: Jose Antonio
authors.initials: JA
authors.lastname: Gonzalez-Jurado
authors.forename: Juan Antonio
authors.initials: JA
authors.lastname: León-Prados
authors.forename: Alfredo
authors.initials: A
authors.lastname: Santalla
authors.forename: Luis
authors.initials: L
authors.lastname: Suarez-Arrones
mesh_terms: D000328:Adult; D056352:Athletes; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D064797:Physical Conditioning, Human / Q000502:physiology*; D005082:Physical Exertion / Q000502:physiology*; D010809:Physical Fitness / Q000502:physiology*; D012916:Soccer / Q000502:physiology*; D055815:Young Adult