Physical activity and obesity

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Jul 5, 2014 - an Ironman distance triathlon on fitness and immune response in ... high-volume triathlon training on illness risk ... Vitamin D. Training load.
Impact of 8-months training preparation for an Ironman distance triathlon on fitness and immune response in recreational athletes.

5th July 2014 Dr Amy Tanner University of Hertfordshire [email protected]

Immune response to training • The popularity of extreme endurance events has grown over the past decade • Few studies have investigated the effect of high-volume triathlon training on illness risk • A high training load has been indicated as a predictor of increased risk of URTI symptoms in athletes (Gleeson et al, 2013; Matthews et al., 2010).

Presentation content Aims: 1. to examine the immune response to 8-months preparation for an ironman triathlon. 2. Consider the fitness adaptations in this population

Background to the study • Large triathlon training study • Multifaceted • Collaborative • What did the study entail?

October 2013

November 2013

Month 0

2 month lead in period 102

82

participants screened prior to participation

participants chosen to participate in study

Month 2

Month 4

Month 6

N=82

N=79

N=75

N=73

Biomechanics

Biomechanics

Biomechanics

Biomechanics

Functional screen

Functional screen

Functional screen

Functional screen

Running economy

Running economy

Running economy

Running economy

VO2max

VO2max

VO2max

VO2max

Lactate threshold

Lactate threshold

Lactate threshold

Lactate threshold

HR training zones

HR training zones

HR training zones

HR training zones

Vitamin D

Vitamin D

Vitamin D

Vitamin D

Training load

Training load

Training load

Training load

Nutrition diary

Nutrition diary

Nutrition diary

Nutrition diary

Immune (n=18) VO2max, saliva sample, illness diary

Immune (n=16) VO2max, saliva sample, illness diary

Immune (n=15) VO2max, saliva sample, illness diary

Immune (n=14) VO2max, saliva sample, illness diary

Psychology – mental toughness

Psychology – mental toughness

Psychology – mental toughness

Psychology – mental toughness

Nutrition

Nutrition

Nutrition

Nutrition

Month 8

Main group (n=40)

Nutrition (n=20)

Performance trial

July, August, September 40km time trial

Tests Urine Saliva Faeces Tailored nutrition advice/None

Immune (n=12) VO2max, saliva sample, illness diary

October 6th 2013 = Challenge Barcelona

Participant characteristics (Mean ± SD) Group

Age (y)

Height (m) Weight (kg)

VO2maxT (mL.kg.mi n)

Race time (hr:min:sec)

IMM (n=12)

32 ± 8

1.75±0.08

73.1 ± 11.3

48 ± 5

14:00:45 ± 01:14:21

CON (n=11)

41 ± 7

1.70 ±0.11

71.4 ± 11.1

43 ± 9

N/A

Methods • Baseline, 2, 4, 6 and 8 month measurements – Treadmill VO2max – Salivary IgA – Salivary lysozyme

• Weekly – illness symptom questionnaire – Training load

Methods Illness episodes • Self assessed questionnaire • Score >12 classified as an illness episode

Salivary measurements • passive collection • Minimal orofacial movement • 3 minute timed collection

Results – training load 6000 #

*

5000

Training Load

#

#

4000

IMM CON

*

3000 2000 1000 0 2

4

6

8

Month

* = sig difference from Month 2 (p