Biomedical subjects

B B Frey

Publications and source records attributed to B B Frey.

3 recordsLinked to original sources

PubMed2004

Validation of a single-day maximal lactate steady state assessment protocol.

AIM: The classical maximal lactate steady state (MLSS) assessment protocol takes multiple days to measure thus necessitates athletes to return to a laboratory for several visits. The purpose of this study was to assess the validity and reliability of a new protocol (Palmer protocol), which proposes to measure MLSS in a single-day. METHODS: Nine endurance-trained males (age 21.1 +/- 1.6 years, VO2max of 63.2 +/- 3.2 ml x kg(-1) x min(-1)) performed the Palmer protocol and the classical MLSS assessment protocol. The classical MLSS protocol consisted of several constant-velocity runs of increasing intensity. The MLSS was defined as the highest velocity associated with an increase in blood lactate concentration ([La-]) = or < 1.0 mmol x L (-1) during the final 20 min of a 30 min run. Concurrent validity was assessed by calculating a Pearson product correlation coefficient between the running velocity at MLSS from the classical protocol and from the single-day Palmer protocol. Test-retest reliability was assessed by calculating a Pearson product correlation coefficient between the running velocities from 2 separate trials of the single-day Palmer protocol. RESULTS: The velocity at MLSS from the single-day Palmer protocol (236.4 +/- 27.8 m x min(-1)) produced a strong correlation of 0.97 (p<0.001) with the velocity at MLSS from the classical protocol (226.3 +/- 22.6 m x min(-1)). An equally strong correlation was calculated from test-retest reliability of the single-day Palmer protocol (r=0.97), (p<0.001). CONCLUSION: These results suggest that the single-day Palmer protocol is valid and reliable in the estimation of MLSS.

Acceleration↗

PubMed2001

Spirituality and well-being: an exploratory study of the patient perspective.

Spirituality has become a construct of interest in American health care: however, there remains a limited understanding of how patients themselves describe spirituality and view its impact on their health and well-being. The purpose of this study was to identify and describe elements of patient-reported, health-related spirituality. A qualitative study utilized focus group interviews of 17 women with type 2 diabetes mellitus and 18 women with no self-identified illness. Purposeful sampling of participants who had prior experiences in healthcare settings, with or without a chronic illness, guided the sampling strategy. Editing analysis of the interview transcripts were coded into conceptual categories. Participant narratives were grouped into eight general categories: (1) change in functional status, (2) core beliefs, (3) medical/disease state information gathering and processing, (4) interpretation and understanding, (5) life scheme, (6) positive intentionality, (7) agency, and (8) subjective well-being. A change in functional status was the catalyst for two process-oriented categories; medical/disease state information gathering and processing, and the higher-order interpretation and understanding, or meaning making of life events. Core beliefs were sources that grounded and maintained an interpretative structure through which participants viewed their life events and positively framed their experiences. Life scheme described a heuristic framework through which all life events were viewed. Positive intentionality was participant belief in the capacity to execute a specific action that was required for a desired outcome. Participants tied the attitudes and practices of positive intentionality with agency, or the use or exertion of power through belief, practice, or community. Participants outlined both a positive affective and cognitive component of subjective well-being. Patients describe several interrelated elements and a process of events in their depiction of spirituality in healthcare settings. Patient-reported spirituality is predominantly a cognitive construct incorporating the domains of life scheme and positive intentionality.

Adult↗

PubMed2001

Minimal influence of carbohydrate ingestion on the immune response following acute resistance exercise.

The effect of carbohydrate supplementation (CHO) on the lymphocyte response to acute resistance exercise was examined in 10 resistance-trained males. Subjects completed a randomized double-blind protocol with sessions separated by 14 days. The exercise session consisted of a high intensity, short rest interval squat workout. Subjects consumed 1.0 g á kg body mass(-1) CHO or an equal volume of placebo (PLC) 10 min prior to and 10 min following exercise. Blood was collected at rest (REST), immediately post exercise (POST), and at 1.5 hours and 4.0 hours of recovery, and analyzed for plasma glucose, serum cortisol, leukocyte subsets, and phytohemagglutinin (PHA)-stimulated lymphocyte proliferation. A significant Treatment 3 Time effect was observed for lymphocyte proliferation between CHO and PLC, but post hoc analyses revealed no between-treatment differences at any post-exercise time point. Lymphocyte proliferation was significantly depressed below REST at POST (-39.2% for PLC, -25.7% for CHO). Significant fluctuations in leukocyte subset trafficking were observed for both treatments at POST, 1.5 hours, and 4.0 hours. Plasma glucose was significantly increased POST in CHO compared to PLC. Cortisol was significantly increased from REST to POST in both treatments. These data support a minimal effect of carbohydrate ingestion on the lymphocyte response to high-intensity resistance exercise.

Adult↗