Blood lead levels of British competitive cyclists.
This study examined the extent to which the potentially toxic lead particulates emitted from motor vehicles are absorbed by competitive cyclists. A time trial (n = 5), a road race (n = 5), and a sedentary control group (n = 5) were examined with respect to blood lead (PbB) levels. In the two cycling groups, the PbB levels were measured before and after (1) a time trial (80 km) held on a dual carriageway; and (2) a road race (120 km) which took place in a rural area. Mean (+/- SE) resting PbB levels for the sedentary subjects, time trialists, and road racers were 0.442 +/- 0.041, 0.490 +/- 0.111 and 0.384 +/- 0.061 mumol l-1 respectively (p > 0.05). Mean post-race PbB levels of the time trialists (0.528 +/- 0.046 mumol l-1) and road racers (0.346 +/- 0.024 mumol l-1) did not differ significantly from the pre-race levels (p > 0.05). However, after their respective races, the mean PbB level of the time trialists was higher than that of the road racers (p < 0.05). Ninety minutes of cycling (70% VO2 max) in a laboratory containing approximately 1 microgram m3 of airborne lead did not affect blood lead levels. All PbB levels compiled with EC regulations regarding lead exposure. Despite a positive relationship between the amount of training and the PbB levels (r = 0.64, p < 0.05), competitive cyclists did not evidence abnormal levels of lead absorption. Time trialing on dual carriageways was associated with higher PbB levels than road racing.(ABSTRACT TRUNCATED AT 250 WORDS)
Atkinson
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G
Centre for Sport and Exercise Sciences, Liverpool John Moores University, UK.
Maclaren
D
D
Taylor
C
C
D000328:Adult; D000393:Air Pollutants / Q000493:pharmacokinetics*; D001642:Bicycling / Q000502:physiology*; D003163:Competitive Behavior / Q000502:physiology*; D006804:Ergonomics; D006801:Humans; D007854:Lead / Q000493:pharmacokinetics*; D008297:Male; D008875:Middle Aged; D010806:Physical Education and Training; D005082:Physical Exertion / Q000502:physiology*; D001335:Vehicle Emissions / Q000032:analysis*
D000393:Air Pollutants; D001335:Vehicle Emissions; D007854:Lead