Biomedical subjects

J Henritze

Publications and source records attributed to J Henritze.

4 recordsLinked to original sources

PubMed1985

Effects of training at and above the lactate threshold on the lactate threshold and maximal oxygen uptake.

Thirty-three college women (mean age = 21.8 years) participated in a 5 d X wk-1, 12 week training program. Subjects were randomly assigned to 3 groups, above lactate threshold (greater than LT) (N = 11; trained at 69 watts above the workload associated with LT), = LT (N = 12; trained at the work load associated with LT) and control (C) (N = 10). Subjects were assessed for VO2max, VO2LT, VO2LT/VO2max, before and after training, using a discontinuous 3 min incremental (starting at 0 watts increasing 34 watts each work load) protocol on a cycle ergometer (Monark). Respiratory gas exchange measures were determined using standard open circuit spirometry while LT was determined from blood samples taken immediately following each work load from an indwelling venous catheter located in the back of a heated hand. Body composition parameters were determined before and after training via hydrostatic weighing. Training work loads were equated so that each subject expended approximately 1465 kJ per training session (Monark cycle ergometer) regardless of training intensity. Pretraining, no significant differences existed between groups for any variable. Post training the greater than LT group had significantly higher VO2max (13%), VO2LT (47%) and VO2LT/VO2max (33%) values as compared to C (p less than .05). Within group comparisons revealed that none of the groups significantly changed VO2max as a result of training, only the greater than LT group showed a significant increase in VO2LT (48%) (p less than .05), while both the = LT and greater than LT group showed significant increases in VO2LT/VO2max (= LT 16%, greater than LT 42% (p less than .05)).(ABSTRACT TRUNCATED AT 250 WORDS)

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PubMed1985

Prediction of maximal effort bicycle ergometer endurance performance.

Fifteen competitive cyclists and 15 subjects not involved in competitive cycling were studied to determine the relationship between VO2max, lactate threshold (LT), fixed blood lactate concentrations, body composition parameters, and maximal effort bicycle ergometer performance. The subjects were assessed for VO2max, LT, VOLT, and VO2 associated with blood lactate concentrations of 3, 4, 5, and 6 mM/l (VO2 3 mM-VO2 6 mM/l), using an incremental protocol on the bicycle ergometer. Body composition was determined by underwater weighing. Subjects also completed two 10-min drop-off performance tests (starting at 70 rpm) at the same absolute power output (4.5 kg resistance, 1890 kgm/min) (ABS) and at the same relative power output (the highest power output completed for 3 min on the VO2max test) (REL). Metabolic measures and revolution scores were collected on a minute-by-minute basis during the performance tests. The results indicated that the competitive cyclists had higher VO2max (4.25 +/- 0.39 vs 3.50 +/- 0.54 l/min); VO2 LT (2.91 +/- 0.55 vs 1.66 +/- 0.49 l/min); VO2 3 mM, VO2 4 mM, VO2 5 mM, VO2 6 mM, VO2 LT/VO2max (68.5 +/- 11.2 vs 47.2 +/- 10.9 %); max resistance (5.70 +/- 0.56 vs 4.63 +/- 0.67 kg); and resistance at LT (3.57 +/- 0.70 vs 1.93 +/- 0.68 kg) as compared to the noncompetitive subjects (P less than 0.05). Correlational analysis revealed poor prediction between metabolic measures and the homogeneous cumulative rpm scores during the REL test.2+ subjects (r = 0.60 to 0.90).(ABSTRACT TRUNCATED AT 250 WORDS)

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PubMedDate not supplied

Coorscreen: a low-cost, on-site mammography screening program.

SETTING: Coors Brewing Company is a self-insured corporation of 10,600 employees located in Golden, Colorado. Management has long believed in the value of a healthy workforce and has instituted ongoing health and wellness programming since 1981. PROGRAM DESIGN: Coorscreen was started in September 1985 to create an ongoing awareness of breast cancer screening and prevention for all female employees, spouses, and retirees and to lower the health care costs for the company through early detection of breast cancer. PROGRAM IMPACT: From 1985 through 1993, 12,210 mammograms were completed on 3729 employees, spouses, and retirees. The participation rate was 83%. Forty-seven malignant conditions were confirmed during the first 8 years. Pathology reports confirmed 43 early detections (10 employees) and four late detections (two employees). The 10 cases of malignant disease detected early among employees cost an average of $12,388 in terms of direct medical costs, short-term disability, temporary replacement, and ongoing benefits. The two cases detected late among employees cost an average of $143,398. Among spouses, cases of malignant disease detected late have cost an average of $69,230 more than cases detected early. On the basis of early detection for 10 employees and 26 spouses, the total savings are estimated to be $3,110,000. DISCUSSION: The Coorscreen program cost savings for the first 8 years were $3,110,080 because of the lower cost of early versus late detection. Total screening and procedural costs to the company have equaled $668,690. Thus the company has realized a total cost savings of $2,441,190.

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PubMedDate not supplied

LIFECHECK: a successful, low touch, low tech, in-plant, cardiovascular disease risk identification and modification program.

LIFECHECK, a voluntary, in-plant cardiovascular risk identification and modification program, was developed to complement Coors Wellness Center-based programs. LIFECHECK was offered to the 1,320 employees located at the Coors Engineering Center and Can Manufacturing Complex at the Coors Brewing Company. The initial 30-minute screening included height, weight, blood pressure, cholesterol, smoking history, weekly Kcal expenditure, self-rating of health, and health effects of stress. Participants concluded the screening session with a wellness counselor who reviewed results and referred them to the appropriate intervention activities. The eight-week intervention was provided at the worksite and was available to all shifts. The intervention included an activity competition and activity classes; nutrition, hypertension, smoking, and lipid classes; a smoke-out day; one-on-one counseling; exercise equipment at four worksites; posters; traymats; table tents; and electronic messages. A total of 692 employees, 52% of those eligible, participated in the initial screening. Of these, 91% had one or more risk factors, and 33% had three to five cardiovascular disease risk factors. A total of 499 employees, 72% of those eligible, completed the follow-up screening. Thirty-two percent of the employees who participated in LIFECHECK had not used the Wellness Center in the eight years it had been open. There were significant changes in employees who completed the eight-week program for systolic blood pressure, total cholesterol, weight, physical activity, and risk of ischemic heart disease within eight years as measured by the Framingham score (p less than 0.05).(ABSTRACT TRUNCATED AT 250 WORDS)

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