Related Experiment Video
Updated: Jul 1, 2025

Characterization of Molecular Mechanisms of In vivo UVR Induced Cataract
Published on: November 28, 2012
Exposure to UV Radiation in Lifeguards on Barcelona's Beaches: An Underestimated Occupational Risk
P Giavedoni1, A Combalia1, N Espinosa2
1Departamento de Dermatología, Institut Clínic de Medicina i Dermatologia (ICMiD), Barcelona, España; Universidad de Barcelona, Barcelona, España.
Background:
The development of skin cancer is closely related to high exposure to UV radiation. Lifeguards are at an increased risk of excessive sun exposure.
Objectives:
The main objective of this study was to measure the exposure of Barcelona's beach lifeguards to UV radiation.
Methods:
Measurements in the work chair were taken every 30min on a typical working day from 10:45 am to 19:15 pm. These measurements were carried out on four different days. These data were used to calculate the erythematous doses received during working hours, as well as those potentially received throughout the summer season. Vitamin D production was also estimated for the four days that the radiation received was measured, and the amount generated was calculated for the entire summer season.
Results:
Exposure to UV radiation among Barcelona lifeguards far exceeds safety limits. In some locations, the exposure to UVB radiation is more than 16 times the minimum erythematous dose for phototype II skin.
Limitations:
This study assessed the radiation received during only four days. However, is a much higher number than most of the published papers.
Conclusion:
Although the health risks of excessive exposure to UV radiation are known, Barcelona's beach lifeguards are insufficiently protected.
Related Concept Videos
Mutations
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
Biological Effects of Radiation
Skin Cancer
Basal Cell Carcinoma (BCC): BCC is the most common type of skin cancer, accounting for about 80% of cases. It typically develops in...
Nucleotide Excision Repair
Cells are regularly exposed to mutagens—factors in the environment that can damage DNA and generate mutations. UV radiation is one of the most common mutagens and is estimated to introduce a significant number of changes in DNA. These include bends or kinks in the structure, which can block DNA replication or transcription. If these errors are not fixed, the damage can cause mutations, which in turn can result in cancer or disease depending on which sequences are...
Factors Affecting Body Temperature
Factors may include:
Relative Risk

