Lind, A.R., Taylor, S.H., Humphreys, P.W., et al.: The circulatory effects of sustained voluntary muscle contraction . Clin. Sci., 27: 229, 1964.
3.
Lind, A.R., McNicol, G.W.: Muscular factors which determine the cardiovascular responses to sustained and rhythmic exercise. Can. Med. Assoc. J., 96: 706, 1967.
4.
Martin, C.E. , Shaver, J.A., Leon , D.F., et al.: Autonomic mechanisms in hemodynamic responses to isometric exercise. J. Clin. Invest., 54: 104, 1974.
5.
Gaskell, W.H. : On the changes of blood stream in muscles through stimulation of their nerves. J. Anat.11: 360, 1877.
6.
Barcroft, H. , Millen, J.L.E.: Blood flow through the muscle during sustained contractions. J. Physiol., 97: 17, 1939.
7.
Jackson, D.H. , Reeves, T.J., Sheffield , L.T., et al.: Isometric effects on treadmill exercise response to healthy young men. Am. J. Cardiol., 31: 344, 1973.
8.
Nutter, D.O. , Schlant, R.C., Hurst , J.R.: Isometric exercise and the cardiovascular system. Med. Concepts. Cardiovasc. Dis.41: 11, 1972.
9.
Freyschuss, U.: Cardiovascular adjustment to somatomotor activation: Elicitation of increments in heart rate, aortic pressure and vasomotor tone with the initiation of muscle contraction. Acta. Physiol. Scand. [Suppl.], 342: 1-63, 1970.
10.
Robinson, B.F. , Epstein, S.E., Beiser , G.D., et al.: Control of heart rate by the autonomic nervous system. Studies in man on the interrelation between baroreceptor mechanisms and exercise. Circ. Res., 19: 400, 1966.
11.
Leon, D.F., Shaver, J.A., Leonard, J.J.: Reflex heart rate control in man. Am. Heart J., 80: 729, 1970.
12.
Goodwin, G.M. , McCloskey, D.T., Mitchell , J.H.: Cardiovascular and respiratory responses to changes in central command during isometric exercise at a constant muscle tension. J. Physiol., 219: 40, 1971.
13.
Staunton, H.P. , Taylor, S.H., Donald , K.W.: Effect of vascular occlusion on the pressor responses to static muscular work. Clin. Sci., 27: 283, 1964.
14.
MacDonald, H.R., Sapru, R.P., Taylor , S.H., et al.: Effects of intravenous propranolol on the systemic circulatory response to sustained handgrip. Am. J. Cardiol., 18: 333, 1966.
15.
Dunlop, D., Shanks, R.G.: Selective blockade of adrenoceptive beta receptors in the heart. Br. J. Pharmacol., 32: 201, 1968.
16.
Tarazi, R.C. , Dustan, H.P.: Beta adrenergic blockade and response to static exercise. Clin. Pharmacol. Ther., 12: 303, 1971 (Abstr).
17.
Freyschuss, U.: Elicitation of heart rate and blood pressure increase on muscle contraction. J. Appl. Physiol., 28: 758, 1970.
18.
Frohlich, E.D. , Tarazi, R.C., Ulrych , M., et al.: Tilt test for investigating a neural component in hypertension. Circulation , 36: 387, 1967.
19.
Frohlich, E.D. , Kozul, V.L., Tarazi , R.C., et al.: Physiological comparison of labile and essential hypertension. Circ. Res. , (Suppl. I)27: 55, 1970.
20.
Bristow, J.D. , Honour, A.J., Pickering , G.W., et al.: Diminished baroreflex sensitivity in high blood pressure. Circulation , 39: 48, 1969.
21.
Griffin, B. , Pickering, T.G., Sleight , P., et al.: Effect of age and high blood pressure on baroreflex sensitivity in man. Circ. Res., 29: 424, 1971.
22.
Hoel, B.L., Lorentsen, E., Lund-Larsen, P.G.: Hemodynamic responses to sustained handgrip in patients with hypertension . Acta. Med. Scand., 188: 491, 1970.
Sokolow, M. , Werdegar, D., Kain , H.K., et al.: Relationship between level of blood pressure measured casually and by portable recorders and severity of complications in essential hypertension. Circulation, 34: 279, 1966.
25.
Helfant, R.H. , DeVilla, M.A., Meister , S.G.: Effect of sustained isometric handgrip exercise on left ventricular performance. Circulation, 44: 982, 1971.
26.
Kivowitz, D. , Parmley, W.W., Donoso , R., et al.: Effects of isometric exercise on cardiac performance: The grip test. Circulation, 44: 994, 1971.