Iodine and selenium loss in sweat and sports performance in New Zealand context

Use heading such as  (just suggestion below, you can use different heading)

2.1 iodine and selenium dietary source (what’s recommended amount per day?)

2.2 Iodine and selenium situation in NZ (adequate iodine/selenium status?)

2.3 Iodine metabolism/function/storage/etc

2.4 selenium metabolism

2.5 iodine and selenium metabolism (you can write them separately as well)

2.6 effect of iodine and selenium on sports performance

2.6 iodine/selenium loss in sweat and urine

2.7 Why are athletes more vulnerable to iodine/selenium deficiency? Why sports people get big iodine/selenium loss? Why should they worry about the high loss of iodine in sweat/why iodine/selenium deficiency is a concern for athletes? - how it affects exercise performance/fatigue/energy/stamina etc. 

Please show studies and explain why they are important. If the studies have limitations, include them as well. Please use correct English and proofread grammars. Use only journal articles (no website). Use APA referencing.