ABSTRACT
Introduction 903
Methods 904
Protocol 904
Sunlight Exposure Dosimetery 904
Statistical Methods 907
Results 909
Discussion 910
Acknowledgment 911
References 911
INTRODUCTION
Today it is generally professed that sunscreen users do not apply sufficient sunsc-
reen to achieve all-day protection and that the sun protection actually achieved
outdoors is significantly over rated by current sun protection factor (SPF) testing
procedures (1-6). Such hypothesis suggests that users of sunscreens are fre-
quently sunburned and consequently sunscreen users are admonished to
frequently reapply the sunscreen. In the summer of 2000, we had the opportunity
to observe sunscreen usage during a weeklong soccer camp for young adolescent
ladies 9-16 years old. Each young lady was required to wear a sunscreen of at
least SPF 30 self-applied each morning. They could either use their own sunsc-
reen or were provided a selection of sunscreens. Each camper applied what she
believed to be a sufficient amount of sunscreen. The campers were in sunlight
from 9 a.m. to noon and then from 1 p.m. to 4 p.m. During these sun-exposed
periods, the campers underwent strenuous exercise and activity. This paper
reports the results of that experience.
