They all have been extremely helpful and provided me invaluable guidance throughout my PhD project with their knowledge and expertise. I would also like to thank the Institute of Sports and Research, the Physical Activity and Public Health Research Group, both research staff and fellow PhD students, for their kind advice and assistance. I am also very grateful to both my friends and partner who not only helped me sail through difficult hard times but also helped me transform the process of working on this PhD into an amazing and joyful experience. Finally, my love and deep gratitude to my family for their sacrifice and unwavering support despite the distance. Without the unconditional love and encouragement of my parents the completion of this project would never have come to fruition.