Oxygen consumption and flight muscle activity during heating in workers and drones of Apis mellifera

1991 ◽  
Vol 161 (1) ◽  
pp. 61-67 ◽  
Author(s):  
Franz Goller ◽  
Harald E. Esch
Keyword(s):  
Oxygen Consumption ◽  
Apis Mellifera ◽  
Muscle Activity ◽  
Flight Muscle

Operant conditioning of antennal muscle activity in the honey bee ( Apis mellifera L.)

2000 ◽  
Vol 186 (6) ◽  
pp. 557-565 ◽  
Author(s):  
J. Erber ◽  
B. Pribbenow ◽  
J. Kisch ◽  
D. Faensen
Keyword(s):  
Apis Mellifera ◽  
Honey Bee ◽  
Operant Conditioning ◽  
Muscle Activity

Blood Lactate Response, Oxygen Consumption, and Muscle Activity during Treadmill Running with Constraint

2014 ◽  
Vol 119 (1) ◽  
pp. 20-37 ◽  
Author(s):  
A. Haudum ◽  
J. Birklbauery ◽  
R. Sieghartsleitner ◽  
C. Gonaus ◽  
E. Müller
Keyword(s):  
Oxygen Consumption ◽  
Blood Lactate ◽  
Muscle Activity ◽  
Treadmill Running

Threshold temperatures for shivering in acute and chronic hypercapnia

1976 ◽  
Vol 41 (1) ◽  
pp. 67-70 ◽  
Author(s):  
K. E. Schaefer ◽  
W. Wunnenberg
Keyword(s):  
Oxygen Consumption ◽  
Cold Exposure ◽  
Muscle Activity ◽  
Chronic Exposure ◽  
Time Course ◽  
Acute Exposure ◽  
Metabolic Adaptation ◽  
Cervical Cord ◽  
Threshold Temperatures ◽  
Electrical Muscle

Threshold temperatures for shivering in acute and chronic hypercapnia were determined in guinea pigs by measuring the time course of cervical cord temperature, skin temperature, oxygen consumption (Vo2), and electrical muscle activity during cold exposure (15 degrees C). Prior to acute exposure to CO2, the shivering threshold was determined in each animal during controlconditions breathing air. With increasing CO2 concentrations (5,7.5, and 15% CO2) the shivering thresholds fell to lower temperatures, decreasing by approximately 40 degrees C at 15% CO2. The shift of the shivering threshold to lower values found during acute exposure to 15% CO2 was reversed after chronic exposure to 15% CO2 for 3 days, which marks the time of metabolic adaptation to CO2.

Efficacy of foot orthoses. What does the literature tell us?

2000 ◽  
Vol 90 (3) ◽  
pp. 149-158 ◽  
Author(s):  
KB Landorf ◽  
AM Keenan
Keyword(s):  
Oxygen Consumption ◽  
Patient Satisfaction ◽  
Muscle Activity ◽  
Foot Orthoses ◽  
Plantar Pressures ◽  
Research Outcome

This paper reviews the literature relating to foot orthoses, in particular foot orthoses that attempt to alter biomechanical function. Whilst few well-controlled studies have been performed, the findings from the available literature are generally positive. The authors provide an overview of this literature and then summarise the findings. The literature is categorised into six research outcome areas: (i) patient satisfaction, (ii) pain and deformity, (iii) plantar pressures, (iv) position and motion, (v) muscle activity, and (vi) oxygen consumption. In addition, the difficulties associated with researching foot orthoses are discussed.

Effect of Arm Cranking Direction on EMG, Kinematic, and Oxygen Consumption Responses

2004 ◽  
Vol 20 (2) ◽  
pp. 129-143 ◽  
Author(s):  
Eadric Bressel ◽  
Gary D. Heise
Keyword(s):  
Oxygen Consumption ◽  
Muscle Activity ◽  
Biceps Brachii ◽  
Emg Activity ◽  
Half Cycle ◽  
Wrist Flexion ◽  
Triceps Brachii ◽  
Arm Cranking ◽  
Video Images ◽  
Consumption Data

The purpose of this study was to compare muscle activity, kinematic, and oxygen consumption characteristics between forward and reverse arm cranking. Twenty able-bodied men performed 5-min exercise bouts of forward and reverse arm cranking while electromyographic (EMG), kinematic, and oxygen consumption data were collected. EMG activity of biceps brachii, triceps brachii, deltoid, and infraspinatus muscles were recorded and analyzed to reflect on-time durations and amplitudes for each half-cycle (first 180° and second 180° of crank cycle). Kinematic data were quantified from digitization of video images, and oxygen consumption was calculated from expired gases. Dependent measures were analyzed with a MANOVA and follow-up univariate procedures; alpha was set at .01. The biceps brachii, deltoid, and infraspinatus muscles displayed greater on-time durations and amplitudes for select half-cycles of reverse arm cranking compared to forward arm cranking (p< 0.01). Peak wrist flexion was 9% less in reverse arm cranking (p< 0.01), and oxygen consumption values did not differ between conditions (p= 0.25). Although there were no differences in oxygen consumption and only minor differences kinematically, reverse arm cranking requires greater muscle activity from the biceps brachii, deltoid, and infraspinatus muscles. These results may allow clinicians to more effectively choose an arm cranking direction that either minimizes or maximizes upper extremity muscle activity depending on the treatment objectives.

Influence of the insecticide pyriproxyfen on the flight muscle differentiation of Apis mellifera (Hymenoptera, Apidae)

2012 ◽  
Vol 75 (6) ◽  
pp. 844-848 ◽  
Author(s):  
Fernanda Corrêa Fernandez ◽  
Carminda Da Cruz-Landim ◽  
Osmar Malaspina
Keyword(s):  
Apis Mellifera ◽  
Flight Muscle ◽  
Muscle Differentiation

Factors contributing to lower metabolic demand of eccentric compared with concentric cycling

2017 ◽  
Vol 123 (4) ◽  
pp. 884-893 ◽  
Author(s):  
Luis Peñailillo ◽  
Anthony J. Blazevich ◽  
Kazunori Nosaka
Keyword(s):  
Oxygen Consumption ◽  
Muscle Activity ◽  
Muscle Activation ◽  
Vastus Lateralis ◽  
Oxygenation Index ◽  
Metabolic Cost ◽  
Rectus Femoris ◽  
Biceps Femoris ◽  
Metabolic Demand ◽  
Length Changes

This study compared muscle-tendon behavior, muscle oxygenation, and muscle activity between eccentric and concentric cycling exercise at the same work output to investigate why metabolic demand is lower during eccentric cycling than with concentric cycling. Eleven untrained men (27.1 ± 7.0 y) performed concentric cycling (CONC) and eccentric cycling (ECC) for 10 min (60 rpm) at 65% of the maximal concentric cycling power output (191 ± 45 W) 4 wk apart. During cycling, oxygen consumption (V̇o2), heart rate (HR), vastus lateralis (VL) tissue total hemoglobin (tHb), and oxygenation index (TOI) were recorded, and muscle-tendon behavior was assessed using ultrasonography. The surface electromyogram (EMG) was recorded from VL, vastus medialis (VM), rectus femoris (RF), and biceps femoris (BF) muscles, and cycling torque and knee joint angle during each revolution were also recorded. Average V̇o2 (−65 ± 7%) and HR (−35 ± 9%) were lower and average TOI was greater (16 ± 1%) during ECC than CONC, but tHb was similar between bouts. Positive and negative cycling peak crank torques were greater (32 ± 21 and 48 ± 24%, respectively) during ECC than CONC, but muscle-tendon unit and fascicle and tendinous tissue length changes during pedal revolutions were similar between CONC and ECC. VL, VM, RF, and BF peak EMG amplitudes were smaller (24 ± 15, 22 ± 18, 16 ± 17, and 18 ± 9%, respectively) during ECC than CONC. These results suggest that the lower metabolic cost of eccentric compared with concentric cycling was due mainly to a lower level of muscle activation per torque output. NEW & NOTEWORTHY This study shows that lower oxygen consumption of eccentric compared with concentric cycling at the same workload is explained by lower muscle activity of agonist and antagonist muscles during eccentric compared with during concentric cycling.

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