Hemorheological responses to progressive resistance exercise training in healthy young males.

BACKGROUND: This study aimed to explore the effects of progressive resistance exercise training (PRET) on hemorheology. MATERIAL/METHODS: Exercise sessions included 1-3 sets of 8-12 repetitions at 40-60% of 1-repetition maximum (1-RM) for 3 weeks and at 75-80% of 1-RM during weeks 4-12. Red blood cell (RBC) deformability and aggregation were determined by ektacytometry, plasma and whole blood viscosities (WBV) by rotational viscometry. Lactate concentration was evaluated by an analyzer and fibrinogen was evaluated by coagulometry. Plasma total oxidant/antioxidant status was measured by colorimetry. RESULTS: Following an acute increase after exercise on the first day, RBC deformability was elevated during weeks 3 and 4 (p=0.028; p=0.034, respectively). The last exercise protocol applied in week 12 again caused an acute increase in this parameter (p=0.034). RBC aggregation was increased acutely on the first day, but decreased after that throughout the protocol (p<0.05). At weeks 4 and 12 pre-exercise measurements of WBV at standard hematocrit and plasma viscosity were decreased (p=0.05; p=0.041, respectively), while post-exercise values were increased (p=0.005; p=0.04, respectively). Post-exercise WBV at autologous hematocrit measured at week 12 was increased (p=0.01). Lactate was elevated after each exercise session (p<0.05). Fibrinogen was decreased on the third week (p<0.01), while it was increased on the 4th week (p=0.005). Plasma antioxidant status was increased at week 3 (p=0.034) and oxidative stress index was decreased at week 4 (p=0.013) after exercise. CONCLUSIONS: The results of this study indicate that PRET may have positive effects on hemorheological parameters.

Reference accuracy in four rehabilitation journals.

OBJECTIVE: To investigate the incidence of reference errors in major peer-reviewed general physical therapy and rehabilitation journals (American Journal of Physical Medicine and Rehabilitation (AJPMR), Archives of Physical Medicine and Rehabilitation (APMR), Clinical Rehabilitation (CR) and Physical Therapy (PT)). DESIGN: Descriptive, comparative. MAIN OUTCOME MEASURES: All issues of the AJPMR, APMR, CR and PT between 2003 and 2007 were studied. For each journal, references from articles were consecutively numbered, and using a random number generator, 100 references were selected from each journal. For each reference, ease of retrieval on MEDLINE and the presence of citation errors were noted. If discrepancies were identified, the reference was compared with the original publication. Two observers independently evaluated each reference for citation errors. RESULTS: The total number of citations with errors among all published journals was 123 (30.7%). The reference error rates by journal ranged from 23% to 44%. Most errors (48.0%) occurred in the author element, followed by the title (31.7%), journal (8.9%), page (5.7%), year (4.1%), and volume (1.6%). Only 8 (2%) were likely to make retrieval of the reference difficult. CONCLUSIONS: Errors in references still appear in current physical therapy and rehabilitation literature, but most are not severe.