08/10/2013
Managing jet lag
For every racing driver the prospect of being able to compete in international races as part of a world championship represents the pinnacle of sporting competition.
However, the physical and emotional demands of travelling to international races are significant in terms of race preparation and ensuring optimal performance.
The feeling of disorientation associated with jet lag can produce a number of symptoms including tiredness, inability to sleep at night, loss of concentration, headaches and nausea. These symptoms occur as a result of biological rhythms being disrupted by a rapid transition across multiple time-zones.
Following a journey across multiple time zones, core body temperature and physical activation (motor skill) levels are reduced. Consequently, until the whole spectrum of biological rhythms adjusts to the new local time, the performance of physical activity may be below par.
Young individuals have a better tolerance to desynchronization of rhythms, owing to a better regulation of biological clocks. Physical fitness also seems to play a role: active subjects demonstrate higher amplitudes in existing rhythms than age-matched controls, a difference indicative of superior regulation. But other than these factors, current research has found little success in attempting to predict good and poor adapters to long haul flights.
Tips for reducing the effect of jet lag:
Scheduling travel
If it is possible to do so, flights should be scheduled so that athletes arrive well in advance of competition. One day for each time zone crossed does leave a cushion of safety, even traveling eastward for the upcoming World Endurance Championship race in Fuji, one day for each time-zone crossed is likely to be required for adequate adaptation.
The time for adaptation may be shortened by exploiting the external factors that reset biological clocks: rest/exercise, darkness/ light, meals and social influences. The key is to tune in to the external influences of the new environment, straight away.
During travel
The physical symptoms already mentioned and the disturbance in cognitive processing associated with hopping time-zones have consequences not only for racing drivers, but also the engineers, mechanics and other team personnel.
With this in mind, throughout long period of inactivity during the plane journey it would be beneficial for all team members to move around the plane periodically during the journey and perform some light stretching exercises to prevent blood-pooling, particularly in the legs.
It would also be beneficial to drink approximately 15-20ml extra water per hour to compensate for the loss of water from the upper respiratory tract attributable to inhaling dry cabin air.
Strategy upon arrival
Natural daylight and bright artificial light help to increase or maintain physical activation and can also contribute to adaptation process for the synchronisation of biological processes.
For athletes, exercise is a powerful resynchroniser. It stimulates catecholamines and alertness so it is recommended, even on the day of arrival, except late in the evening local time. Exercise at a light intensity is adequate for stimulating resynchronization of rhythmic characteristics, as exercise that is too strenuous may disrupt rather than promote sleep.
In terms of planning nutrition, biasing the macronutrients in evening meals generally towards carbohydrates for sustained energy and sufficient fibre for efficient digestion would be beneficial. Recommended choices include vegetables, potatoes, brown pasta and bread, but not necessarily rice.
Caffeine (in coffee) and theophylline (in tea) are stimulants of the central nervous system. It may be beneficial to drink these in the evening as they would help in recovery after flying eastward and in the afternoon after flying westward.
However, alcohol consumed late in the evening is likely to disrupt sleep and therefore is not advised.
If you would like further information about how best to prepare for international competition, or for any questions or queries you may have about improving your fitness do not hesitate to contact the Prodrive Driver Performance team.