Yoga Breathing Techniques Have No Impact on Isokinetic and Isoinertial Power.

Wooten, SV, Cherup, N, Mazzei, N, Patel, S, Mooney, K, Rafiq, A, and Signorile, JF. Yoga breathing techniques have no impact on isokinetic and isoinertial power. J Strength Cond Res 34(2): 430-439, 2020-As an exercise discipline, yoga incorporates breathing (pranayama) and posture (asana) techniques to facilitate improvements in flexibility, strength, and meditation. Both techniques have been used to enhance muscular strength and power output. The purpose of this study was to determine the effects of various yoga breathing techniques on lower-limb power output. Thirty-two individuals (15 men and 17 women) participated in the study. All subjects performed a baseline 1 repetition maximum (1RM) on a pneumatic leg press machine and isokinetic testing on a Biodex 4 dynamometer. Participants then performed 3RM power tests at 50% of 1RM on the pneumatic leg press machine using 3 different yoga breathing techniques (Ujjayi, Bhastrika, and Kapalabhati) and normal breathing (control) across all repetitions. After power testing, participants completed an isokinetic test on the Biodex 4 dynamometer using their dominant leg. Subjects had their knee placed at a predetermined starting position (90°) and executed knee extension at 3 randomized testing speeds (60, 180, and 300°·s). The implementation of specific breathing protocols before and during the leg press produced no significant differences in power output. For isokinetic power measured at 60, 180, and 300°·s, there was a significant difference among testing speeds (η = 0.639; p < 0.0001) and a significant sex × speed interaction (η = 0.064; p < 0.0001), where men consistently demonstrated greater isoinertial power, isokinetic power, isokinetic torque, and isokinetic work than women. No other significant differences or interactions were detected. The differences between our study and others, which have concluded that adopting specific breathing techniques can enhance core stability and force production during lifting, may be attributable to the acute nature of the design, the novice participants who had insufficient time to practice the breathing techniques or testing protocols, and the use of tests that isolated specific muscle groups. Nonetheless, the current findings do not support the use of yoga breathing techniques as a method to enhance power output, whether used before or during power performance.

ED visits, hospital admissions and treatment breaks in head/neck cancer patients undergoing radiotherapy.

Objectives: Radiation therapy (RT) is an integral part of treatment of head/neck cancer (HNC) but is associated with many toxicities. We sought to evaluate sociodemographic, pathologic, and clinical factors associated with emergency department (ED) visits, hospital admissions (HA), and RT breaks in HNC patients undergoing curative-intent RT. Methods: We completed a Level 3 (Oxford criteria for evidence-based medicine) analysis of a cohort of HNC patients who underwent curative-intent RT at our institution from 2013 to 2017. We collected demographic characteristics and retrospectively assessed for heavy opioid use, ED visits or HA during RT as well as RT breaks. Treatment breaks were defined as total days to RT fractions ratio ≥1.6. Multivariable stepwise logistic regression analyses were done to determine the association of various sociodemographic, pathologic, and clinical characteristics with ED visits, HA and RT treatment breaks. Results: The cohort included 376 HNC patients (294 male, 82 female, median age 61). On multivariable analysis, significant factors associated with ED visits during RT were heavy opioid use and black race. Receipt of concomitant chemotherapy was the only factor associated with hospital admissions during RT. Advanced age, lower socioeconomic class, glandular site, and receipt of chemotherapy were all independently associated with RT breaks. Lower cancer stage and lack of substance abuse history were independently associated with lack of treatment breaks. Conclusion: HNC patients with factors such as heavy opioid use, Black race, receipt of concomitant chemotherapy, and lower socioeconomic class may require closer monitoring during RT.

Emergent Radiotherapy for Leukemia-Induced Cranial Neuropathies Refractory to Intrathecal Therapy.

Neurologic symptoms from leukemic infiltration of the central nervous system are an oncologic emergency, and expeditious treatment is required to preserve function. We report the case of a 44-year-old patient with relapsed acute myeloid leukemia (AML) who developed sub-acute cranial neuropathies refractory to treatment with intrathecal (IT) chemotherapy. The patient was therefore treated with an emergent course of whole-brain radiotherapy, resulting in immediate improvement and subsequent resolution of cranial neuropathies. This case illustrates that while central nervous system involvement by AML is rare, radiotherapy remains an effective modality to avoid long-term morbidity in patients failing to respond to systemic or IT chemotherapy.