This is an electronic reprint of the original article. This reprint may differ from the original in pagination and typographic detail. Author(s): Title: Year: Version: Please cite the original version: All material supplied via JYX is protected by copyright and other intellectual property rights, and duplication or sale of all or part of any of the repository collections is not permitted, except that material may be duplicated by you for your research use or educational purposes in electronic or print form. You must obtain permission for any other use. Electronic or print copies may not be offered, whether for sale or otherwise to anyone who is not an authorised user. Physical activity, heart rate variability–based stress and recovery, and subjective stress during a 9-month study period Föhr, Tiina; Tolvanen, Asko; Myllymäki, Tero; Järvelä-Reijonen, E.; Peuhkuri, K.; Rantala, S.; Kolehmainen, M.; Korpela, R.; Lappalainen, Raimo; Ermes, M.; Puttonen, S.; Rusko, Heikki; Kujala, Urho Föhr, T., Tolvanen, A., Myllymäki, T., Järvelä-Reijonen, E., Peuhkuri, K., Rantala, S., . . . Kujala, U. (2017). Physical activity, heart rate variability–based stress and recovery, and subjective stress during a 9-month study period. Scandinavian Journal of Medicine and Science in Sports, 27 (6), 612-621. doi:10.1111/sms.12683 2017