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Ibn Babawayh – also known as al-Shaykh al-Saduq – was a prominent Twelver Shi'i scholar of hadith. Writing within the first century after the vanishing of the twelfth imam, al-Saduq represents a pivotal moment in Twelver hadith literature, as this Shi'i community adjusted to a world without a visible imam and guide, a world wherein the imams could only be accessed through the text of their remembered words and deeds. George Warner’s study of al-Saduq’s work examines the formation of Shi'i hadith literature in light of these unique dynamics, as well as giving a portrait of an important...

Balancing training, stress, and recovery is essential for achieving optimal performance. The performance of professional athletes can be severely compromised by overtraining, injuries, prolonged periods of competition, or even life events outside their sporting lives. The current recovery-stress state depends on preceding stress and recovery activities, but through simultaneous assessment of stress and recovery, a differentiated picture can be provided. This manual includes two measurement instruments to gauge individual recovery, enabling both athletes and coaches to better understand the...